Adding upstream version 4.9.0.upstream/4.9.0upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 5402 insertions, 0 deletions

diff --git a/doc/screen.1 b/doc/screen.1
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+.\" vi:set wm=5
+.TH SCREEN 1 "2022 Jan 30" "GNU Screen 4.9.0"
+.
+.
+.SH NAME
+screen \- screen manager with VT100/ANSI terminal emulation
+
+
+.SH SYNOPSIS
+.B screen
+[
+.B \-\fIoptions\fP
+] [
+.B \fIcmd\fP
+[
+.B \fIargs\fP
+] ]
+.br
+.B screen \-r
+[[\fIpid\fP\fB.\fP]\fItty\fP[\fB.\fP\fIhost\fP]]
+.br
+.B screen \-r
+\fIsessionowner\fP\fB/\fP[[\fIpid\fP\fB.\fP]\fItty\fP[\fB.\fP\fIhost\fP]]
+.ta .5i 1.8i
+
+
+.SH DESCRIPTION
+.I Screen
+is a full-screen window manager that
+multiplexes a physical terminal between several processes (typically
+interactive shells).
+Each virtual terminal provides the functions
+of a DEC VT100 terminal and, in addition, several control functions
+from the ISO 6429 (ECMA 48, ANSI X3.64) and ISO 2022 standards
+(e.\|g. insert/delete line and support for multiple character sets).
+There is a scrollback history buffer for each virtual terminal and a
+copy-and-paste mechanism that allows moving text regions between
+windows.
+.PP
+When
+.I screen
+is called, it creates a single window with a shell in it (or the specified
+command) and then gets out of your way so that you can use the program as you
+normally would.
+Then, at any time, you can create new (full-screen) windows with other programs
+in them (including more shells), kill existing windows, view a list of
+windows, turn output logging on and off, copy-and-paste text between
+windows, view the scrollback history, switch between windows
+in whatever manner you wish, etc. All windows run their programs completely
+independent of each other. Programs continue to run when their window
+is currently not visible and even when the whole 
+.I screen 
+session is detached from the user's terminal.  When a program terminates,
+.I screen
+(per default) kills the window that contained it.
+If this window was in the foreground, the display switches to the previous
+window; if none are left,
+.I screen
+exits. Shells usually distinguish between running as login-shell or sub-shell.
+Screen runs them as sub-shells, unless told otherwise (See \*Qshell\*U .screenrc command).
+.PP
+Everything you type is sent to the program running in the current window.
+The only exception to this is the one keystroke that is used to initiate
+a command to the window manager.
+By default, each command begins with a control-a (abbreviated C-a from
+now on), and is followed by one other keystroke.
+The command character and all the key bindings can be fully customized
+to be anything you like, though they are always two characters in length.
+.PP
+.I Screen
+does not understand the prefix \*QC-\*U to mean control, although this notation is 
+used in this manual for readability. 
+Please use the caret notation (\*Q^A\*U instead of \*QC-a\*U) as arguments
+to e.g. the 
+.I escape
+command or the \fI-e\fP option.
+.I Screen
+will also print out control characters in caret notation.
+.PP
+The standard way to create a new window is to type \fBC-a c\fP.
+This creates a new window running a shell and switches to that
+window immediately, regardless of the state of the process running
+in the current window.
+Similarly, you can create a new window with a custom command in it by
+first binding the command to a keystroke (in your .screenrc file or at the
+\fBC-a :\fP command line) and
+then using it just like the \fBC-a c\fP command.
+In addition, new windows can be created by running a command like:
+.IP
+screen emacs prog.c
+.PP
+from a shell prompt within a previously created window.
+This will not run another copy of
+.IR screen ,
+but will instead supply the command name and its arguments to the window
+manager (specified in the $STY environment variable) who will use it to
+create the new window.
+The above example would start the emacs editor (editing prog.c) and switch
+to its window. - Note that you cannot transport environment variables from
+the invoking shell to the application (emacs in this case), because it is
+forked from the parent screen process, not from the invoking shell.
+.PP
+If \*Q/etc/utmp\*U is writable by
+.IR screen ,
+an appropriate record will be written to this file for each window, and
+removed when the window is terminated.
+This is useful for working with \*Qtalk\*U, \*Qscript\*U, \*Qshutdown\*U,
+\*Qrsend\*U, \*Qsccs\*U and other similar programs that use the utmp
+file to determine who you are. As long as
+.I screen
+is active on your terminal,
+the terminal's own record is removed from the utmp file. See also \*QC-a L\*U.
+
+
+.SH GETTING STARTED
+Before you begin to use
+.I screen
+you'll need to make sure you have correctly selected your terminal type,
+just as you would for any other termcap/terminfo program.
+(You can do this by using
+.IR test
+for example.)
+.PP
+If you're impatient and want to get started without doing a lot more reading,
+you should remember this one command:  \fBC-a ?\fP.
+Typing these two characters will display a list of the available
+.I screen
+commands and their bindings. Each keystroke is discussed in
+the section \*QDEFAULT KEY BINDINGS\*U. The manual section \*QCUSTOMIZATION\*U
+deals with the contents of your .screenrc.
+.PP
+If your terminal is a \*Qtrue\*U auto-margin terminal (it doesn't allow
+the last position on the screen to be updated without scrolling the
+screen) consider using a version of your terminal's termcap that has
+automatic margins turned \fIoff\fP. This will ensure an accurate and
+optimal update of the screen in all circumstances. Most terminals
+nowadays have \*Qmagic\*U margins (automatic margins plus usable last
+column). This is the VT100 style type and perfectly suited for
+.IR screen .
+If all you've got is a \*Qtrue\*U auto-margin terminal 
+.I screen
+will be content to use it, but updating a character put into the last
+position on the screen may not be possible until the screen scrolls or
+the character is moved into a safe position in some other way. This
+delay can be shortened by using a terminal with insert-character
+capability.
+
+
+.SH "COMMAND-LINE OPTIONS"
+Screen has the following command-line options:
+.TP 5
+.B \-a
+include \fIall\fP capabilities (with some minor exceptions) in each
+window's termcap, even if
+.I screen
+must redraw parts of the display in order to implement a function.
+.TP 5
+.B \-A
+Adapt the sizes of all windows to the size of the current terminal.
+By default,
+.I screen
+tries to restore its old window sizes when attaching to resizable terminals
+(those with \*QWS\*U in its description, e.g. suncmd or some xterm).
+.TP 5
+.BI "\-c " file
+override the default configuration file from \*Q$HOME/.screenrc\*U
+to \fIfile\fP.
+.TP 5
+.BR \-d | \-D " [" \fIpid.tty.host\fR ]
+does not start
+.IR screen ,
+but detaches the elsewhere running
+.I screen
+session. It has the same effect as typing \*QC-a d\*U from
+.IR screen 's
+controlling terminal. \fB\-D\fP is the equivalent to the power detach key.
+If no session can be detached, this option is ignored. In combination with the
+\fB\-r\fP/\fB\-R\fP option more powerful effects can be achieved:
+.TP 8
+.B \-d \-r
+Reattach a session and if necessary detach it first.
+.TP 8
+.B \-d \-R
+Reattach a session and if necessary detach or even create it first.
+.TP 8
+.B \-d \-RR
+Reattach a session and if necessary detach or create it. Use the first
+session if more than one session is available.
+.TP 8
+.B \-D \-r
+Reattach a session. If necessary detach and logout remotely first.
+.TP 8
+.B \-D \-R
+Attach here and now. In detail this means: If a session is running, then
+reattach. If necessary detach and logout remotely first.
+If it was not running create it and notify the user. This is the
+author's favorite.
+.TP 8
+.B \-D \-RR
+Attach here and now. Whatever that means, just do it.
+.IP "" 5
+Note: It is always a good idea to check the status of your sessions by means of
+\*Qscreen \-list\*U.
+.TP 5
+.BI "\-e " xy
+specifies the command character to be \fIx\fP and the character generating a
+literal command character to \fIy\fP (when typed after the command character).
+The default is \*QC-a\*U and `a', which can be specified as \*Q-e^Aa\*U.
+When creating a
+.I screen
+session, this option sets the default command character. In a multiuser
+session all users added will start off with this command character. But
+when attaching to an already running session, this option changes only
+the command character of the attaching user.
+This option is equivalent to either the commands \*Qdefescape\*U or
+\*Qescape\*U respectively.
+.TP 5
+.BR \-f\fP ", " \-fn ", and " \-fa
+turns flow-control on, off, or \*Qautomatic switching mode\*U.
+This can also be defined through the \*Qdefflow\*U .screenrc command.
+.TP 5
+.BI "\-h " num
+Specifies the history scrollback buffer to be \fInum\fP lines high.
+.TP 5
+.B \-i
+will cause the interrupt key (usually C-c) to interrupt the display
+immediately when flow-control is on.
+See the \*Qdefflow\*U .screenrc command for details.
+The use of this option is discouraged.
+.TP 5
+.BR \-l " and " \-ln
+turns login mode on or off (for /etc/utmp updating).
+This can also be defined through the \*Qdeflogin\*U .screenrc command.
+.TP 5
+.BR \-ls " [" \fImatch ]
+.PD 0
+.TP 5
+.BR \-list " [" \fImatch ] 
+.PD
+does not start
+.IR screen ,
+but prints a list of
+.I pid.tty.host
+strings identifying your
+.I screen
+sessions.
+Sessions marked `detached' can be resumed with \*Qscreen \-r\*U. Those marked
+`attached' are running and have a controlling terminal. If the session runs in 
+multiuser mode, it is marked `multi'. Sessions marked as `unreachable' either
+live on a different host or are `dead'.
+An unreachable session is considered dead, when its name
+matches either the name of the local host, or the specified parameter, if any.
+See the \fB-r\fP flag for a description how to construct matches.
+Sessions marked as `dead' should be thoroughly checked and removed. 
+Ask your system administrator if you are not sure. Remove sessions with the 
+\fB-wipe\fP option. 
+.TP 5
+.B \-L
+tells
+.I screen
+to turn on automatic output logging for the windows.
+.TP 5
+.BI "\-Logfile " file
+By default logfile name is \*Qscreenlog.0\*Q. You can set new logfile name
+with the \*Q-Logfile\*Q option.
+.TP 5
+.B \-m
+causes
+.I screen
+to ignore the $STY environment variable. With \*Qscreen \-m\*U creation of
+a new session is enforced, regardless whether
+.I screen
+is called from within another
+.I screen
+session or not. This flag has a special meaning in connection
+with the `\-d' option:
+.TP 8
+.B \-d \-m
+Start
+.I screen
+in \*Qdetached\*U mode. This creates a new session but doesn't
+attach to it. This is useful for system startup scripts.
+.TP 8
+.B \-D \-m
+This also starts screen in \*Qdetached\*U mode, but doesn't fork
+a new process. The command exits if the session terminates.
+.TP 5
+.B \-O
+selects an optimal output mode for your terminal rather than true VT100
+emulation (only affects auto-margin terminals without `LP').
+This can also be set in your .screenrc by specifying `OP' in a \*Qtermcap\*U
+command.
+.TP 5
+.BI "\-p " number_or_name|-|=|+
+Preselect a window. This is useful when you want to reattach to a
+specific window or you want to send a command via the \*Q-X\*U
+option to a specific window. As with screen's select command, \*Q-\*U
+selects the blank window. As a special case for reattach, \*Q=\*U
+brings up the windowlist on the blank window, while a \*Q+\*U
+will create a new window. The command will not be
+executed if the specified window could not be found.
+.TP 5
+.B \-q
+Suppress printing of error messages. In combination with \*Q-ls\*U the exit 
+value is as follows: 9 indicates a directory without sessions. 10 
+indicates a directory with running but not attachable sessions. 11 (or more) 
+indicates 1 (or more) usable sessions.
+In combination with \*Q-r\*U the exit value is as follows: 10 indicates that 
+there is no session to resume. 12 (or more) indicates that there are 2 (or 
+more) sessions to resume and you should specify which one to choose. 
+In all other cases \*Q-q\*U has no effect.
+.TP 5
+.B \-Q
+Some commands now can be queried from a remote session using this
+flag, e.g. \*Qscreen \-Q windows\*U. The commands will send the
+response to the stdout of the querying process. If there was an
+error in the command, then the querying process will exit with
+a non-zero status.
+
+The commands that can be queried now are:
+ \fBecho\fP
+ \fBinfo\fP
+ \fBlastmsg\fP
+ \fBnumber\fP
+ \fBselect\fP
+ \fBtime\fP
+ \fBtitle\fP
+ \fBwindows\fP
+.TP 5
+.BR \-r " [" \fIpid.tty.host ]
+.PD 0
+.TP 5
+.BR \-r " \fIsessionowner/[" \fIpid.tty.host ]
+.PD
+resumes a detached
+.I screen
+session.  No other options (except combinations with \fB\-d\fP/\fB\-D\fP) may
+be specified, though an optional prefix of [\fIpid.\fP]\fItty.host\fP
+may be needed to distinguish between multiple detached
+.I screen
+sessions.  The second form is used to connect to another user's screen session
+which runs in multiuser mode. This indicates that screen should look for
+sessions in another user's directory. This requires setuid-root.
+.TP 5
+.B \-R
+resumes screen only when it's unambiguous which one to attach, usually
+when only one
+.I screen
+is detached. Otherwise lists available sessions.
+.B \-RR
+attempts to resume the first detached
+.I screen
+session it finds.  If successful, all other command-line options are ignored.
+If no detached session exists, starts a new session using the specified
+options, just as if
+.B \-R
+had not been specified. The option is set by default if
+.I screen
+is run as a login-shell (actually screen uses \*Q\-xRR\*U in that case).
+For combinations with the \fB\-d\fP/\fB\-D\fP option see there.
+.TP 5
+.BI "\-s " program 
+sets the default shell to the program specified, instead of the value
+in the environment variable $SHELL (or \*Q/bin/sh\*U if not defined).
+This can also be defined through the \*Qshell\*U .screenrc command.
+See also there.
+.TP 5
+.BI "\-S " sessionname
+When creating a new session, this option can be used to specify a
+meaningful name for the session. This name identifies the session for
+\*Qscreen \-list\*U and \*Qscreen \-r\*U actions. It substitutes the
+default [\fItty.host\fP] suffix. This name should not be longer
+then 80 symbols.
+.TP 5
+.BI "\-t " name
+sets the title (a.\|k.\|a.) for the default shell or specified program.
+See also the \*Qshelltitle\*U .screenrc command.
+.TP 5
+.BI "\-T " term
+Set the $TERM environment variable using the specified term as
+opposed to the default setting of \fBscreen\fP.
+.TP 5
+.B \-U
+Run screen in UTF-8 mode. This option tells screen that your terminal
+sends and understands UTF-8 encoded characters. It also sets the default
+encoding for new windows to `utf8'.
+.TP 5
+.B \-v
+Print version number.
+.TP 5
+.BR \-wipe " [" \fImatch ]
+does the same as \*Qscreen \-ls\*U, but removes destroyed sessions instead of
+marking them as `dead'.
+An unreachable session is considered dead, when its name matches either 
+the name of the local host, or the explicitly given parameter, if any.
+See the \fB-r\fP flag for a description how to construct matches.
+.TP 5
+.B \-x
+Attach to a not detached
+.I screen
+session. (Multi display mode).
+.I Screen
+refuses to attach from within itself. 
+But when cascading multiple screens, loops are not detected; take care.
+.TP 5
+.B \-X
+Send the specified command to a running screen session. You may
+use the \fB-S\fP option to specify the screen session if you have
+several screen sessions running. You can use the \fB-d\fP or
+\fB-r\fP option to tell screen to look only for attached or
+detached screen sessions. Note that this command doesn't work if
+the session is password protected.
+
+.TP 5
+.B \-4
+Resolve hostnames only to IPv4 addresses.
+.TP 5
+.B \-6
+Resolve hostnames only to IPv6 addresses.
+.SH "DEFAULT KEY BINDINGS"
+.ta 12n 26n
+As mentioned, each
+.I screen
+command consists of a
+\*QC-a\*U followed by one other character.
+For your convenience, all commands that are bound to lower-case letters are
+also bound to their control character counterparts (with the exception
+of \*QC-a a\*U; see below), thus, \*QC-a c\*U as well as \*QC-a C-c\*U can
+be used to create a window. See section \*QCUSTOMIZATION\*U for a description
+of the command.
+.PP
+The following table shows the default key bindings. The trailing
+commas in boxes with multiple keystroke entries are separators,
+not part of the bindings.
+.TS
+tab(;);
+lb l l.
+_
+C-a ';(select);T{
+Prompt for a window name or number to switch to.
+T}
+_
+C-a \[dq];(windowlist -b);T{
+Present a list of all windows for selection.
+T}
+_
+C-a \fIdigit\fP;(select 0-9);T{
+Switch to window number 0 \- 9
+T}
+_
+C-a -;(select -);T{
+Switch to window number 0 \- 9, or to the blank window.
+T}
+_
+C-a tab;(focus);T{
+Switch the input focus to the next region.
+See also \fIsplit, remove, only\fP.
+T}
+_
+C-a C-a;(other);T{
+Toggle to the window displayed previously.
+Note that this binding defaults to the command character typed twice,
+unless overridden.  For instance, if you use the option \*Q\fB\-e]x\fP\*U,
+this command becomes \*Q]]\*U.
+T}
+_
+C-a a  ;(meta);T{
+Send the command character (C-a) to window. See \fIescape\fP command.
+T}
+_
+C-a A;(title);T{
+Allow the user to enter a name for the current window.
+T}
+_
+T{
+C-a b,
+.br
+C-a C-b
+T};(break);T{
+Send a break to window.
+T}
+_
+C-a B;(pow_break);T{
+Reopen the terminal line and send a break.
+T}
+_
+T{
+C-a c,
+.br
+C-a C-c
+T};(screen);T{
+Create a new window with a shell and switch to that window.
+T}
+_
+C-a C\fP;(clear);T{
+Clear the screen.
+T}
+_
+T{
+C-a d,
+.br
+C-a C-d
+T};(detach);T{
+Detach
+.I screen
+from this terminal.
+T}
+_
+C-a D D;(pow_detach);T{
+Detach and logout.
+T}
+_
+T{
+C-a f,
+.br
+C-a C-f\fP
+T};(flow);T{
+Toggle flow \fIon\fP, \fIoff\fP or \fIauto\fP.
+T}
+_
+C-a F;(fit);T{
+Resize the window to the current region size.
+T}
+_
+C-a C-g;(vbell);T{
+Toggles
+.I screen's
+visual bell mode.
+T}
+_
+C-a h;(hardcopy);T{
+Write a hardcopy of the current window to the file \*Qhardcopy.\fIn\fP\*U.
+T}
+_
+C-a H;(log);T{
+Begins/ends logging of the current window to the file \*Qscreenlog.\fIn\fP\*U.
+T}
+_
+T{
+C-a i,
+.br
+C-a C-i
+T};(info);T{
+Show info about this window.
+T}
+_
+T{
+C-a k,
+.br
+C-a C-k
+T};(kill);T{
+Destroy current window.
+T}
+_
+T{
+C-a l,
+.br
+C-a C-l
+T};(redisplay);T{
+Fully refresh current window.
+T}
+_
+C-a L;(login);T{
+Toggle this windows login slot. Available only if
+.I screen
+is configured to update the utmp database.
+T}
+_
+T{
+C-a m,
+.br
+C-a C-m
+T};(lastmsg);T{
+Repeat the last message displayed in the message line.
+T}
+_
+C-a M;(monitor);T{
+Toggles monitoring of the current window.
+T}
+_
+T{
+C-a space,
+.br
+C-a n,
+.br
+C-a C-n
+T};(next);T{
+Switch to the next window.
+T}
+_
+C-a N;(number);T{
+Show the number (and title) of the current window.
+T}
+_
+T{
+C-a backspace,
+.br
+C-a C-h,
+.br
+C-a p,
+.br
+C-a C-p
+T};(prev);T{
+Switch to the previous window (opposite of \fBC-a n\fP).
+T}
+_
+T{
+C-a q,
+.br
+C-a C-q
+T};(xon);T{
+Send a control-q to the current window.
+T}
+_
+C-a Q;(only);T{
+Delete all regions but the current one.
+See also \fIsplit, remove, focus\fP.
+T}
+_
+T{
+C-a r,
+.br
+C-a C-r
+T};(wrap);T{
+Toggle the current window's line-wrap setting (turn the current window's
+automatic margins on and off).
+T}
+_
+T{
+C-a s,
+.br
+C-a C-s;
+T};(xoff);T{
+Send a control-s to the current window.
+T}
+_
+C-a S;(split);T{
+Split the current region horizontally into two new ones.
+See also \fIonly, remove, focus\fP.
+T}
+_
+T{
+C-a t,
+.br
+C-a C-t
+T};(time);T{
+Show system information.
+T}
+_
+C-a v;(version);T{
+Display the version and compilation date.
+T}
+_
+C-a C-v;(digraph);T{
+Enter digraph.
+T}
+T{
+C-a w,
+.br
+C-a C-w
+T};(windows);T{
+Show a list of window.
+T}
+_
+C-a W;(width);T{
+Toggle 80/132 columns.
+T}
+_
+C-a x \fRor\fP C-a C-x;(lockscreen);T{
+Lock this terminal.
+T}
+_
+C-a X\fP ;(remove);T{
+Kill the current region.
+See also \fIsplit, only, focus\fP.
+T}
+_
+T{
+C-a z,
+.br
+C-a C-z
+T};(suspend);T{
+Suspend
+.IR screen .
+Your system must support BSD-style job-control.
+T}
+_
+C-a Z;(reset);T{
+Reset the virtual terminal to its \*Qpower-on\*U values.
+T}
+_
+C-a .;(dumptermcap);T{
+Write out a \*Q.termcap\*U file.
+T}
+_
+C-a ?;(help);T{
+Show key bindings.
+T}
+_
+C-a \e;(quit);T{
+Kill all windows and terminate
+.IR screen .
+T}
+_
+C-a :;(colon);T{
+Enter command line mode.
+T}
+_
+T{
+C-a [,
+.br
+C-a C-[\fP,
+.br
+C-a esc
+T};(copy);T{
+Enter copy/scrollback mode.
+T}
+_
+T{
+C-a C-],
+.br
+C-a ]
+T};(paste .);T{
+Write the contents of the paste buffer to the stdin queue of the
+current window. 
+T}
+_
+T{
+C-a {\fP,
+.br
+C-a }
+T};(history);T{
+Copy and paste a previous (command) line.
+T}
+_
+C-a >;(writebuf);T{
+Write paste buffer to a file.
+T}
+_
+C-a <;(readbuf);T{
+Reads the screen-exchange file into the paste buffer.
+T}
+_
+C-a =;(removebuf);T{
+Removes the file used by \fBC-a <\fP and \fPC-a >\fP.
+T}
+_
+C-a ,;(license);T{
+Shows where
+.I screen
+comes from, where it went to and why you can use it.
+T}
+_
+C-a _;(silence);T{
+Start/stop monitoring the current window for inactivity.
+T}
+_
+C-a |;(split -v);T{
+Split the current region vertically into two new ones.
+T}
+_
+C-a *;(displays);T{
+Show a listing of all currently attached displays.
+T}
+_
+.TE
+
+.SH CUSTOMIZATION
+The \*Qsocket directory\*U defaults either to $HOME/.screen or simply to
+/tmp/screens or preferably to /usr/local/screens chosen at compile-time. If
+.I screen
+is installed setuid-root, then the administrator
+should compile
+.I screen
+with an adequate (not NFS mounted) socket directory. If
+.I screen
+is not running setuid-root, the user can specify any mode 700 directory
+in the environment variable $SCREENDIR.
+.PP
+When
+.I screen
+is invoked, it executes initialization commands from the files
+\*Q/usr/local/etc/screenrc\*U and
+\*Q.screenrc\*U in the user's home directory. These are the \*Qprogrammer's
+defaults\*U that can be overridden in the following ways: for the
+global screenrc file 
+.I screen
+searches for the environment variable $SYSSCREENRC (this override feature
+may be disabled at compile-time). The user specific
+screenrc file is searched in $SCREENRC, then $HOME/.screenrc.
+The command line option \fB\-c\fP takes
+precedence over the above user screenrc files.
+.PP
+Commands in these files are used to set options, bind functions to
+keys, and to automatically establish one or more windows at the
+beginning of your
+.I screen
+session.
+Commands are listed one per line, with empty lines being ignored.
+A command's arguments are separated by tabs or spaces, and may be
+surrounded by single or double quotes.
+A `#' turns the rest of the line into a comment, except in quotes.
+Unintelligible lines are warned about and ignored.
+Commands may contain references to environment variables. The 
+syntax is the shell-like "$VAR " or "${VAR}". Note that this causes 
+incompatibility with previous 
+.I screen
+versions, as now the '$'-character has to be protected with '\e' if no
+variable substitution shall be performed. A string in single-quotes is also
+protected from variable substitution.
+.PP
+Two configuration files are shipped as examples with your screen distribution:
+\*Qetc/screenrc\*U and \*Qetc/etcscreenrc\*U. They contain a number of
+useful examples for various commands.
+.PP
+Customization can also be done 'on-line'. To enter the command mode type
+`C-a :'. Note that commands starting with \*Qdef\*U change default values,
+while others change current settings.
+.PP
+The following commands are available:
+.TP
+.BI acladd " usernames " \fR[\fP crypted-pw \fR]\fR
+.TP
+.BI addacl " usernames"
+.RS 0
+.PP
+Enable users to fully access this screen session. \fIUsernames\fP can be one
+user or a comma separated list of users. This command enables to attach to the
+.I screen
+session and performs the equivalent of `aclchg \fIusernames\fP +rwx \&"#?\&"'.
+executed. To add a user with restricted access, use the `aclchg' command below.
+If an optional second parameter is supplied, it should be a crypted password
+for the named user(s). `Addacl' is a synonym to `acladd'.
+Multi user mode only.
+.RE 
+.TP
+.BI aclchg " usernames permbits list"
+.TP
+.BI chacl " usernames permbits list"
+.RS 0
+.PP
+Change permissions for a comma separated list of users. Permission bits are
+represented as `r', `w' and `x'. Prefixing `+' grants the permission, `\-'
+removes it. The third parameter is a comma separated list of commands and/or
+windows (specified either by number or title). The special list `#' refers to 
+all windows, `?' to all commands. if \fIusernames\fP consists of a single `*',
+all known users are affected.
+.PP
+A command can be executed when the user has the `x' bit for it.
+The user can type input to a window when he has its `w' bit set and no other
+user obtains a writelock for this window. 
+Other bits are currently ignored.  
+To withdraw the writelock from another user in window 2:
+`aclchg \fIusername\fP \-w+w 2'.
+To allow read-only access to the session: `aclchg \fIusername\fP
+\-w \&"#\&"'. As soon as a user's name is known to
+.I screen 
+he can attach to the session and (per default) has full permissions for all 
+command and windows. Execution permission for the acl commands, `at' and others
+should also be removed or the user may be able to regain write permission.
+Rights of the special username
+.B nobody
+cannot be changed (see the \*Qsu\*U command).
+`Chacl' is a synonym to `aclchg'.
+Multi user mode only.
+.RE
+.TP
+.BI acldel " username"
+.RS 0
+.PP
+Remove a user from
+.IR screen 's
+access control list. If currently attached, all the
+user's displays are detached from the session. He cannot attach again.
+Multi user mode only.
+.RE
+.TP
+.BI aclgrp " username " \fR[\fP groupname \fR]\fP
+.RS 0
+.PP
+Creates groups of users that share common access rights. The name of the 
+group is the username of the group leader. Each member of the group inherits
+the permissions that are granted to the group leader. That means, if a user
+fails an access check, another check is made for the group leader.
+A user is removed from all groups the special value \*Qnone\*U is used for
+.IR groupname .
+If the second parameter is omitted all groups the user is in are listed.
+.RE
+.TP
+\fBaclumask\fP [[ \fIusers\fP ] \fI+bits\fP | [ \fIusers\fR ] \fI-bits...\fP ]
+.TP
+\fBumask\fP [[ \fIusers\fP ] \fI+bits\fP | [ \fIusers\fR ] \fI-bits...\fP ]
+.RS 0
+.PP
+This specifies the access other users have to windows that will be created by
+the caller of the command.
+.I Users
+may be no, one or a comma separated list of known usernames. If no users are
+specified, a list of all currently known users is assumed. 
+.I Bits
+is any combination of access control bits allowed defined with the 
+\*Qaclchg\*U command. The special username \*Q?\*U predefines the access
+that not yet known users will be granted to any window initially.
+The special username \*Q??\*U predefines the access that not yet known 
+users are granted to any command. 
+Rights of the special username
+.B nobody
+cannot be changed (see the \*Qsu\*U command).
+`Umask' is a synonym to `aclumask'.
+.RE
+.TP
+.BI activity " message"
+.RS 0
+.PP
+When any activity occurs in a background window that is being monitored,
+.I screen
+displays a notification in the message line.
+The notification message can be re-defined by means of the \*Qactivity\*U
+command.
+Each occurrence of `%' in \fImessage\fP is replaced by
+the number of the window in which activity has occurred,
+and each occurrence of `^G' is replaced by the definition for bell
+in your termcap (usually an audible bell).
+The default message is
+.PP
+.nf
+	'Activity in window %n'
+.fi
+.PP
+Note that monitoring is off for all windows by default, but can be altered
+by use of the \*Qmonitor\*U command (C-a M).
+.RE
+.TP
+.BR "allpartial [ on | off ]"
+.RS 0
+.PP
+If set to on, only the current cursor line is refreshed on window change.
+This affects all windows and is useful for slow terminal lines. The 
+previous setting of full/partial refresh for each window is restored
+with \*Qallpartial off\*U.  This is a global flag that immediately takes effect
+on all windows overriding the \*Qpartial\*U settings. It does not change the
+default redraw behavior of newly created windows.
+.RE
+.TP
+.BR "altscreen [ on | off ]"
+.RS 0
+.PP
+If set to on, "alternate screen" support is enabled in virtual terminals,
+just like in xterm.  Initial setting is `off'.
+.RE
+.TP
+.BR "at " "[\fIidentifier\fP][" "#\fP|\fP*\fP|\fP%\fP] " "command " [ \fIargs\fP " ... ]"
+.RS 0
+.PP
+Execute a command at other displays or windows as if it had been entered there.
+\*QAt\*U changes the context (the `current window' or `current display'
+setting) of the command. If the first parameter describes a 
+non-unique context, the command will be executed multiple times. If the first 
+parameter is of the form `\fIidentifier\fP*' then identifier is matched against
+user names.  The command is executed once for each display of the selected 
+user(s). If the first parameter is of the form `\fIidentifier\fP%' identifier 
+is matched against displays. Displays are named after the ttys they 
+attach. The prefix `/dev/' or `/dev/tty' may be omitted from the identifier.
+If \fIidentifier\fP has a `#' or nothing appended it is matched against 
+window numbers and titles. Omitting an identifier in front of the `#', `*' or 
+`%'-character selects all users, displays or windows because a prefix-match is
+performed. Note that on the affected display(s) a short message will describe
+what happened. Permission is checked for initiator of the \*Qat\*U command,
+not for the owners of the affected display(s).
+Note that the '#' character works as a comment introducer when it is preceded by
+whitespace. This can be escaped by prefixing a '\e'. 
+Permission is checked for the initiator of the \*Qat\*U command, not for the
+owners of the affected display(s).
+.PP
+Caveat: 
+When matching against windows, the command is executed at least 
+once per window. Commands that change the internal arrangement of windows
+(like \*Qother\*U) may be called again. In shared windows the command will
+be repeated for each attached display. Beware, when issuing toggle commands
+like \*Qlogin\*U!
+Some commands (e.g. \*Qprocess\*U) require that 
+a display is associated with the target windows.  These commands may not work
+correctly under \*Qat\*U looping over windows.
+.RE
+.TP
+.BI "attrcolor " "attrib " \fR[\fP "attribute/color-modifier" \fR]\fP
+.RS 0
+.PP
+This command can be used to highlight attributes by changing the color of
+the text. If the attribute
+.I attrib
+is in use, the specified attribute/color modifier is also applied. If no
+modifier is given, the current one is deleted. See the \*QSTRING ESCAPES\*U
+chapter for the syntax of the modifier. Screen understands two
+pseudo-attributes, \*Qi\*U stands for high-intensity foreground
+color and \*QI\*U for high-intensity background color.
+.sp
+Examples:
+.IP
+attrcolor b "R"
+.PP
+Change the color to bright red if bold text is to be printed.
+.IP
+attrcolor u "\-u b"
+.PP
+Use blue text instead of underline.
+.IP
+attrcolor b ".I"
+.PP
+Use bright colors for bold text. Most terminal emulators do this
+already.
+.IP
+attrcolor i "+b"
+.PP
+Make bright colored text also bold.
+.RE
+.TP
+.BR "autodetach [ on | off ]"
+.RS 0
+.PP
+Sets whether 
+.I screen
+will automatically detach upon hangup, which
+saves all your running programs until they are resumed with a
+.B "screen \-r"
+command.
+When turned off, a hangup signal will terminate 
+.I screen
+and all the processes it contains. Autodetach is on by default.
+.RE
+.TP
+.BR "autonuke [ on | off ]"
+.RS 0
+.PP
+Sets whether a clear screen sequence should nuke all the output
+that has not been written to the terminal. See also
+\*Qobuflimit\*U.
+.RE
+.TP
+.BI "backtick " "id lifespan autorefresh cmd args..."
+.TP
+.BI "backtick " id
+.RS 0
+.PP
+Program the backtick command with the numerical id \fIid\fP.
+The output of such a command is used for substitution of the
+\*Q%`\*U string escape. The specified \fIlifespan\fP is the number
+of seconds the output is considered valid. After this time, the
+command is run again if a corresponding string escape is encountered.
+The \fIautorefresh\fP parameter triggers an
+automatic refresh for caption and hardstatus strings after the
+specified number of seconds. Only the last line of output is used
+for substitution.
+.PP
+If both the \fIlifespan\fP and the \fIautorefresh\fP parameters
+are zero, the backtick program is expected to stay in the
+background and generate output once in a while.
+In this case, the command is executed right away and screen stores
+the last line of output. If a new line gets printed screen will
+automatically refresh the hardstatus or the captions.
+.PP
+The second form of the command deletes the backtick command
+with the numerical id \fIid\fP.
+.RE
+.TP
+.BR "bce [ on | off ]"
+.RS 0
+.PP
+Change background-color-erase setting. If \*Qbce\*U is set to on, all
+characters cleared by an erase/insert/scroll/clear operation
+will be displayed in the current background color. Otherwise
+the default background color is used.
+.RE
+.TP
+.BR "bell_msg " [ \fImessage\fP ]
+.RS 0
+.PP
+When a bell character is sent to a background window,
+.I screen
+displays a notification in the message line.
+The notification message can be re-defined by this command.
+Each occurrence of `%' in \fImessage\fP is replaced by
+the number of the window to which a bell has been sent,
+and each occurrence of `^G' is replaced by the definition for bell
+in your termcap (usually an audible bell).
+The default message is
+.PP
+.nf
+	'Bell in window %n'
+.fi
+.PP
+An empty message can be supplied to the \*Qbell_msg\*U command to suppress
+output of a message line (bell_msg "").
+Without parameter, the current message is shown.
+.RE
+.TP
+.BR "bind " [ \fIclass\fP ] " \fIkey\fP " [ \fIcommand\fP " [" \fIargs\fP ]]
+.RS 0
+.PP
+Bind a command to a key.
+By default, most of the commands provided by
+.I screen
+are bound to one or more keys as indicated in the \*QDEFAULT KEY BINDINGS\*U
+section, e.\|g. the
+command to create a new window is bound to \*QC-c\*U and \*Qc\*U.
+The \*Qbind\*U command can be used to redefine the key bindings and to
+define new bindings.
+The \fIkey\fP argument is either a single character, a two-character sequence
+of the form \*Q^x\*U (meaning \*QC-x\*U), a backslash followed by an octal
+number (specifying the ASCII code of the character), or a backslash followed
+by a second character, such as \*Q\e^\*U or \*Q\e\e\*U.
+The argument can also be quoted, if you like.
+If no further argument is given, any previously established binding
+for this key is removed.
+The \fIcommand\fP argument can be any command listed in this section.
+.PP
+If a command class is specified via the \*Q\-c\*U option, the key
+is bound for the specified class. Use the \*Qcommand\*U command
+to activate a class. Command classes can be used to create multiple
+command keys or multi-character bindings.
+.PP
+Some examples:
+.PP
+.nf
+	bind ' ' windows
+	bind ^k
+	bind k
+	bind K kill
+	bind ^f screen telnet foobar
+	bind \e033 screen \-ln \-t root \-h 1000 9 su
+.fi
+.PP
+would bind the space key to the command that displays a list
+of windows (so that the command usually invoked by \*QC-a C-w\*U
+would also be available as \*QC-a space\*U). The next three lines
+remove the default kill binding from \*QC-a C-k\*U and \*QC-a k\*U. 
+\*QC-a K\*U is then bound to the kill command. Then it
+binds \*QC-f\*U to the command \*Qcreate a window with a TELNET
+connection to foobar\*U, and bind \*Qescape\*U to the command
+that creates an non-login window with a.\|k.\|a. \*Qroot\*U in slot #9, with
+a superuser shell and a scrollback buffer of 1000 lines.
+.PP
+.nf
+	bind \-c demo1 0 select 10
+	bind \-c demo1 1 select 11
+	bind \-c demo1 2 select 12
+	bindkey "^B" command \-c demo1
+.fi
+.PP
+makes \*QC-b 0\*U select window 10, \*QC-b 1\*U window 11, etc.
+.PP
+.nf
+	bind \-c demo2 0 select 10
+	bind \-c demo2 1 select 11
+	bind \-c demo2 2 select 12
+	bind \- command \-c demo2
+.fi
+.PP
+makes \*QC-a \- 0\*U select window 10, \*QC-a \- 1\*U window 11, etc.
+.RE
+.TP
+.BR "bindkey " [ \-d "] [" \-m "] [" \-a "] [[" \-k | \-t ] " \fIstring\fR " [ "\fIcmd-args\fP" ]]
+.RS 0
+.PP
+This command manages screen's input translation tables. Every
+entry in one of the tables tells screen how to react if a certain
+sequence of characters is encountered. There are three tables:
+one that should contain actions programmed by the user, one for
+the default actions used for terminal emulation and one for
+screen's copy mode to do cursor movement. See section
+\*QINPUT TRANSLATION\*U for a list of default key bindings.
+.PP
+If the
+.B \-d
+option is given, bindkey modifies the default table,
+.B \-m
+changes the copy mode table
+and with neither option the user table is selected.
+The argument
+.I string
+is the sequence of characters to which an action is bound. This
+can either be a fixed string or a termcap keyboard capability
+name (selectable with the
+.B \-k
+option).
+.PP
+Some keys on a VT100 terminal can send a different
+string if application mode is turned on (e.g the cursor keys).
+Such keys have two entries in the translation table. You can
+select the application mode entry by specifying the
+.B \-a
+option.
+.PP
+The
+.B \-t
+option tells screen not to do inter-character timing. One cannot
+turn off the timing if a termcap capability is used.
+.PP
+.I Cmd
+can be any of screen's commands with an arbitrary number of
+.IR args .
+If
+.I cmd
+is omitted the key-binding is removed from the table.
+.PP
+Here are some examples of keyboard bindings:
+.sp
+.nf
+        bindkey \-d
+.fi
+.sp
+Show all of the default key bindings. The application mode entries
+are marked with [A].
+.sp
+.nf
+        bindkey \-k k1 select 1
+.fi
+.sp
+Make the "F1" key switch to window one.
+.sp
+.nf
+        bindkey \-t foo stuff barfoo
+.fi
+.sp
+Make "foo" an abbreviation of the word "barfoo". Timeout is disabled
+so that users can type slowly.
+.sp
+.nf
+        bindkey "\e024" mapdefault
+.fi
+.sp
+This key-binding makes \*Q^T\*U an escape character for key-bindings. If
+you did the above \*Qstuff barfoo\*U binding, you can enter the word
+\*Qfoo\*U by typing \*Q^Tfoo\*U. If you want to insert a \*Q^T\*U
+you have to press the key twice (i.e., escape the escape binding).
+.sp
+.nf
+        bindkey \-k F1 command
+.fi
+.sp
+Make the F11 (not F1!) key an alternative screen
+escape (besides ^A).
+.RE
+.TP
+.BR "break " [ \fIduration\fR ]
+.RS 0
+.PP
+Send a break signal for \fIduration\fP*0.25 seconds to this window.
+For non-Posix systems the time interval may be rounded up to full seconds.
+Most useful if a character device is attached to the window rather than 
+a shell process (See also chapter \*QWINDOW TYPES\*U). The maximum duration of
+a break signal is limited to 15 seconds.
+.RE
+.TP
+.B blanker
+.RS 0
+.PP
+Activate the screen blanker. First the screen is cleared. If no blanker
+program is defined, the cursor is turned off, otherwise, the 
+program is started and it's output is written to the screen.
+The screen blanker is killed with the first keypress, the read key
+is discarded.
+.PP
+This command is normally used together with the \*Qidle\*U command.
+.RE
+.TP
+.IR "\fBblankerprg\fR " [ "program-args" ]
+.RS 0
+.PP
+Defines a blanker program. Disables the blanker program if an
+empty argument is given. Shows the currently set blanker program if no
+arguments are given.
+.RE
+.TP
+.IR "\fBbreaktype\fP " [ tcsendbreak | TIOCSBRK | TCSBRK ]
+.RS 0
+.PP
+Choose one of the available methods of generating a break signal for
+terminal devices. This command should affect the current window only.
+But it still behaves identical to \*Qdefbreaktype\*U. This will be changed in
+the future.
+Calling \*Qbreaktype\*U with no parameter displays the break method for the
+current window.
+.RE
+.TP
+.IR "\fBbufferfile\fP " [ exchange-file ]
+.RS 0
+.PP
+Change the filename used for reading and writing with the paste buffer.
+If the optional argument to the \*Qbufferfile\*U command is omitted, 
+the default setting (\*Q/tmp/screen\-exchange\*U) is reactivated.
+The following example will paste the system's password file into 
+the
+.I screen
+window (using the paste buffer, where a copy remains):
+.PP
+.nf
+	C-a : bufferfile /etc/passwd
+	C-a < C-a ]
+	C-a : bufferfile
+.fi
+.sp
+.ne 3
+.BR bumpleft
+.PP
+Swaps window with previous one on window list.
+.RE
+.TP
+.BR bumpright
+.RS 0
+.PP
+Swaps window with next one on window list.
+.RE
+.TP
+.BR "c1 [ on | off ]"
+.RS 0
+.PP
+Change c1 code processing. \fBC1 on\fP tells screen to treat
+the input characters between 128 and 159 as control functions.
+Such an 8-bit code is normally the same as ESC followed by the
+corresponding 7-bit code. The default setting is to process c1
+codes and can be changed with the \*Qdefc1\*U command. 
+Users with fonts that have usable characters in the
+c1 positions may want to turn this off.
+.RE
+.TP
+.BR "caption [ top | bottom ] always" | splitonly [ string ]
+.TP
+.IR "\fBcaption string\fP " [ string ]
+.RS 0
+.PP
+This command controls the display of the window captions. Normally
+a caption is only used if more than one window is shown on the
+display (split screen mode). But if the type is set to
+.B always
+screen shows a caption even if only one window is displayed. The default
+is
+.BR splitonly .
+.P
+The second form changes the text used for the caption. You can use
+all escapes from the \*QSTRING ESCAPES\*U chapter. Screen uses
+a default of `%3n %t'.
+.P
+You can mix both forms by providing a string as an additional argument.
+.P
+You can have the caption displayed either at the top or bottom of the window.
+The default is 
+.BR bottom .
+.RE
+.TP
+.BI "charset " set
+.RS 0
+.PP
+Change the current character set slot designation and charset
+mapping.  The first four character of
+.I set
+are treated as charset designators while the fifth and sixth
+character must be in range '0' to '3' and set the GL/GR charset
+mapping. On every position a '.' may be used to indicate that
+the corresponding charset/mapping should not be changed
+(\fIset\fP is padded to six characters internally by appending '.'
+chars). New windows have "BBBB02" as default charset, unless a
+\*Qencoding\*U command is active.
+.br
+The current setting can be viewed with the \*Qinfo\*U command.
+.RE
+.TP
+.IR "\fBchdir\fP " [ directory ]
+.RS 0
+.PP
+Change the \fIcurrent directory\fP of
+.I screen
+to the specified directory or, if called without an argument,
+to your home directory (the value of the environment variable $HOME).
+All windows that are created by means of the \*Qscreen\*U command
+from within \*Q.screenrc\*U or by means of \*QC-a : screen ...\*U
+or \*QC-a c\*U use this as their default directory.
+Without a chdir command, this would be the directory from which
+.I screen
+was invoked.
+.PP
+Hardcopy and log files are always written to the \fIwindow's\fP default
+directory, \fInot\fP the current directory of the process running in the
+window.
+You can use this command multiple times in your .screenrc to start various
+windows in different default directories, but the last chdir value will
+affect all the windows you create interactively.
+.RE
+.TP
+.B cjkwidth [ on | off ]
+.RS 0
+.PP
+Treat ambiguous width characters as full/half width.
+.RE
+.TP
+.B clear
+.RS 0
+.PP
+Clears the current window and saves its image to the scrollback buffer.
+.RE
+.TP
+.B collapse
+.RS 0
+.PP
+Reorders window on window list, removing number gaps between them.
+.RE
+.TP
+.IR "\fBcolon " [ prefix ]
+.RS 0
+.PP
+Allows you to enter \*Q.screenrc\*U command lines. Useful 
+for on-the-fly modification of key bindings, 
+specific window creation and changing settings. Note that the \*Qset\*U
+keyword no longer exists! Usually commands affect the current window rather 
+than default settings for future windows. Change defaults with commands
+starting with 'def...'.
+.PP
+If you consider this as the `Ex command mode' of 
+.IR screen ,
+you may regard \*QC-a esc\*U (copy mode) as its `Vi command mode'.
+.RE
+.TP
+.BR "command [ \-c " \fIclass\fP" ]"
+.RS 0
+.PP
+This command has the same effect as typing the screen escape
+character (^A). It is probably only useful for key bindings.
+If the \*Q\-c\*U option is given, select the specified command
+class.  See also \*Qbind\*U and \*Qbindkey\*U.
+.RE
+.TP
+.BR "compacthist [ on | off ]"
+.RS 0
+.PP
+This tells screen whether to suppress trailing blank lines when
+scrolling up text into the history buffer.
+.RE
+.TP
+.BR "console [ on | off ]"
+.RS 0
+.PP
+Grabs or un-grabs the machines console output to a window.
+.IR Note :
+Only the owner of /dev/console can grab the console output.
+This command is only available if the machine supports the ioctl TIOCCONS.
+.RE
+.TP
+.B copy
+.RS 0
+.PP
+Enter copy/scrollback mode. This allows you to copy text from the current
+window and its history into the paste buffer. In this mode a vi-like
+`full screen editor' is active:
+.br
+The editor's movement keys are:
+
+.TS
+tab(@);
+l l.
+_
+T{
+\fBh\fP, \fBC-h\fP,
+.br
+\fBleft arrow\fP
+T}@move the cursor left.
+_
+T{
+\fBj\fP, \fBC-n\fP,
+.br
+\fBdown arrow\fP
+T}@move the cursor down.
+_
+T{
+\fBk\fP, \fBC-p\fP,
+.br
+\fBup arrow\fP
+T}@move the cursor up.
+_
+T{
+\fBl\fP ('el'),
+.br
+\fBright arrow\fP
+T}@move the cursor right.
+_
+\fB0\fP (zero) \fBC-a\fP@move to the leftmost column.
+_
+\fB+\fP and \fB\-\fP@positions one line up and down.
+_
+\fBH\fP, \fBM\fP and \fBL\fP@T{
+move the cursor to the leftmost column
+of the top, center or bottom line of the window. 
+T}
+_
+\fB|\fP@moves to the specified absolute column.
+_
+\fBg\fP or \fBhome\fP@moves to the beginning of the buffer.
+_
+\fBG\fP or \fBend\fP@T{
+moves to the specified absolute line (default: end of buffer).
+T}
+_
+\fB%\fP@jumps to the specified percentage of the buffer.
+_
+\fB^\fP or \fB$\fP@T{
+move to the leftmost column, to the first or last
+non-whitespace character on the line.
+T}
+_
+\fBw\fP, \fBb\fP, and \fBe\fP@move the cursor word by word.
+_
+\fBB\fP, \fBE\fP@move the cursor WORD by WORD (as in vi).
+_
+\fBf/F\fP, \fBt/T\fP@T{
+move the cursor forward/backward to the next occurrence of the
+target. (eg, '3fy' will move the cursor to the 3rd 'y' to the right.)
+T}
+_
+\fB;\fP and \fB,\fP@T{
+Repeat the last f/F/t/T command in the same/opposite direction.
+T}
+_
+\fBC-e\fP and \fBC-y\fP@T{
+scroll the display up/down by one line
+while preserving the cursor position.
+T}
+_
+\fBC-u\fP and \fBC-d\fP@T{
+scroll the display up/down by the specified amount of 
+lines while preserving the cursor position. (Default: half screen-full). 
+T}
+_
+\fBC-b\fP and \fBC-f\fP@scroll the display up/down a full screen.
+_
+.TE
+.\"\fBf\fP,\fBt\fP, \fBF\fP, \fBT\fP@T{
+.\"move the cursor forward/backward to the next occurrence of the target.
+.\"T}
+
+.PP
+Note: Emacs style movement keys can be customized by a .screenrc
+command.  (E.\|g. markkeys "h=^B:l=^F:$=^E") There is no simple method
+for a full emacs-style keymap, as this involves multi-character codes.
+.PP
+Some keys are defined to do mark and replace operations.
+.PP
+The copy range is specified by setting two marks. The text between these marks 
+will be highlighted. Press:
+.IP
+\fBspace\fP or \fBenter\fP to set the first or second mark
+respectively. If \fBmousetrack\fP is set to `on', marks can also be set using
+\fPleft mouse click\fP.
+.PP
+.IP
+\fBY\fP and \fBy\fP used to mark one whole line or to mark from 
+start of line.
+.IP
+\fBW\fP marks exactly one word. 
+.PP
+Any of these commands can be prefixed with a repeat count number by pressing 
+digits 
+.IP
+\fB0\fP..\fB9\fP which
+is taken as a repeat count. 
+.PP
+Example: \*QC-a C-[ H 10 j 5 Y\*U will copy lines
+11 to 15 into the paste buffer.
+.PP
+The following search keys are defined:
+.IP
+\fB/\fP \fIVi\fP-like search forward.
+.IP
+\fB?\fP \fIVi\fP-like search backward.
+.IP 
+\fBC-a s\fP \fIEmacs\fP style incremental search forward.
+.IP
+\fBC-r\fP \fIEmacs\fP style reverse i-search.
+.IP
+\fBn\fP Find next search pattern.
+.IP
+\fBN\fP Find previous search pattern.
+
+.PP
+There are however some keys that act differently than in
+.IR vi .
+.I Vi
+does not allow one to yank rectangular blocks of text, but
+.I screen
+does. Press: \fBc\fP or \fBC\fP to set the left or right margin
+respectively. If no repeat count is given, both default to the current
+cursor position.
+.PP
+Example: Try this on a rather full text screen: 
+.sp 1
+.RS
+\*QC-a [ M 20 l SPACE c 10 l 5 j C SPACE\*U.
+.RE
+.sp 1
+This moves one to the middle line of the screen, moves in 20 columns left,
+marks the beginning of the paste buffer, sets the left column, moves 5 columns
+down, sets the right column, and then marks the end of
+the paste buffer. Now try:
+.sp 1
+.RS
+\*QC-a [ M 20 l SPACE 10 l 5 j SPACE\*U
+.RE
+.sp 1
+and notice the difference in the amount of text copied.
+.PP
+\fBJ\fP joins lines. It toggles between 4 modes: lines separated by a
+newline character (012), lines glued seamless, lines separated by a single
+whitespace and comma separated lines. Note that you can prepend the newline
+character with a carriage return character, by issuing a \*Qcrlf on\*U.
+.PP
+\fBv\fP or \fBV\fP is for all the
+.I vi 
+users with \*Q:set numbers\*U \- it toggles the left margin between column 9
+and 1. Press 
+.PP
+\fBa\fP before the final space key to toggle in append mode. Thus
+the contents of the paste buffer will not be overwritten, but is appended to.
+.PP
+\fBA\fP toggles in append mode and sets a (second) mark.
+.PP
+\fB>\fP sets the (second) mark and writes the contents of the paste buffer to
+the screen-exchange file (/tmp/screen\-exchange per default) once copy-mode is
+finished. 
+.PP
+This example demonstrates how to dump the whole scrollback buffer 
+to that file: \*QC-A [ g SPACE G $ >\*U.
+.PP
+\fBC-g\fP gives information about the current line and column.
+.PP
+\fBx\fP or \fBo\fP exchanges the first mark and the current cursor position. You
+can use this to adjust an already placed mark.
+.PP
+\fBC-l\fP ('el') will redraw the screen.
+.PP
+\fB@\fP does nothing. Does not even exit copy mode.
+.PP
+All keys not described here exit copy mode.
+.RE
+.TP
+.IR "\fBcopy_reg " [ key ]
+.RS 0
+.PP
+No longer exists, use \*Qreadreg\*U instead.
+.RE
+.TP
+.BR "crlf [ on | off ]"
+.RS 0
+.PP
+This affects the copying of text regions with the `C-a [' command. If it is set
+to `on', lines will be separated by the two character sequence `CR' - `LF'. 
+Otherwise (default) only `LF' is used.
+When no parameter is given, the state is toggled.
+.RE
+.TP
+.BR "debug [ on | off ]"
+.RS 0
+.PP
+Turns runtime debugging on or off. If 
+.I screen
+has been compiled with option \-DDEBUG debugging available and is turned on per
+default. Note that this command only affects debugging output from the main 
+\*QSCREEN\*U process correctly. Debug output from attacher processes can only
+be turned off once and forever.
+.RE
+.TP
+.BR "defc1 [ on | off ]"
+.RS 0
+.PP
+Same as the \fBc1\fP command except that the default setting for new
+windows is changed. Initial setting is `on'.
+.RE
+.TP
+.BR "defautonuke [ on | off ]"
+.RS 0
+.PP
+Same as the \fBautonuke\fP command except that the default setting for new displays is changed. Initial setting is `off'.
+Note that you can use the special `AN' terminal capability if you
+want to have a dependency on the terminal type.
+.RE
+.TP
+.BR "defbce [ on | off ]"
+.RS 0
+.PP
+Same as the \fBbce\fP command except that the default setting for new
+windows is changed. Initial setting is `off'.
+.RE
+.TP
+.IR "\fBdefbreaktype\fP " [ tcsendbreak | TIOCSBRK | TCSBRK ]
+.RS 0
+.PP
+Choose one of the available methods of generating a break signal for
+terminal devices. The preferred methods are 
+.IR tcsendbreak " and " TIOCSBRK .
+The third, 
+.IR TCSBRK , 
+blocks the complete 
+.I screen
+session for the duration
+of the break, but it may be the only way to generate long breaks. 
+.IR Tcsendbreak " and " TIOCSBRK
+may or may not produce long breaks with spikes (e.g. 4 per
+second). This is not only system-dependent, this also differs between
+serial board drivers.
+Calling \*Qdefbreaktype\*U with no parameter displays the current setting.
+.RE
+.TP
+.BR "defcharset " [ \fIset ]
+.RS 0
+.PP
+Like the \fBcharset\fP command except that the default setting for
+new windows is changed. Shows current default if called without
+argument.
+.RE
+.TP
+.BR "defdynamictitle [ on | off ]"
+.RS 0
+.PP
+Set default behaviour for new windows regarding if screen should change window
+title when seeing proper escape sequence. See also "TITLES (naming windows)"
+section.
+.RE
+.TP
+.BI "defescape " xy
+.RS 0
+.PP
+Set the default command characters. This is equivalent to the 
+\*Qescape\*U except that it is useful multiuser sessions only. In a
+multiuser session \*Qescape\*U changes the command character of the
+calling user, where \*Qdefescape\*U changes the default command
+characters for users that will be added later.
+.RE
+.TP
+.BR "defflow [ on | off | auto [ interrupt ]]
+.RS 0
+.PP
+Same as the \fBflow\fP command except that the default setting for new windows 
+is changed. Initial setting is `auto'.
+Specifying \fBdefflow auto interrupt\fP is the same as the command-line options
+.B \-fa
+and
+.BR \-i . 
+.RE
+.TP
+.BR "defgr [ on | off ]"
+.RS 0
+.PP
+Same as the \fBgr\fP command except that the default setting for new
+windows is changed. Initial setting is `off'.
+.RE
+.TP
+.BR "defhstatus " [ \fIstatus ]
+.RS 0
+.PP
+The hardstatus line that all new windows will get is set to
+.I status\fR.
+This command is useful to make the hardstatus of every window
+display the window number or title or the like.
+.I Status
+may contain the same directives as in the window messages, but
+the directive escape character is '^E' (octal 005) instead of '%'.
+This was done to make a misinterpretation of program generated
+hardstatus lines impossible.
+If the parameter
+.I status
+is omitted, the current default string is displayed.
+Per default the hardstatus line of new windows is empty.
+.RE
+.TP
+.BI "defencoding " enc
+.RS 0
+.PP
+Same as the \fBencoding\fP command except that the default setting for new
+windows is changed. Initial setting is the encoding taken from the
+terminal.
+.RE
+.TP
+.BR "deflog [ on | off ]"
+.RS 0
+.PP
+Same as the \fBlog\fP command except that the default setting for new windows 
+is changed. Initial setting is `off'.
+.RE
+.TP
+.BR "deflogin [ on | off ]"
+.RS 0
+.PP
+Same as the \fBlogin\fP command except that the default setting for new windows 
+is changed. This is initialized with `on' as distributed (see config.h.in).
+.RE
+.TP
+.BI "defmode " mode
+.RS 0
+.PP
+The mode of each newly allocated pseudo-tty is set to \fImode\fP.
+\fIMode\fP is an octal number.
+When no \*Qdefmode\*U command is given, mode 0622 is used.
+.RE
+.TP
+.BR "defmonitor [ on | off]"
+.RS 0
+.PP
+Same as the \fBmonitor\fP command except that the default setting for new 
+windows is changed. Initial setting is `off'.
+.RE
+.TP
+.BR "defmousetrack [ on | off ]"
+.RS 0
+.PP
+Same as the \fBmousetrack\fP command except that the default setting for new
+windows is changed. Initial setting is `off'.
+.RE
+.TP
+.BR "defnonblock [ on | off | \fInumsecs\fP]
+.RS 0
+.PP
+Same as the \fBnonblock\fP command except that the default setting for
+displays is changed. Initial setting is `off'.
+.RE
+.TP
+.BI "defobuflimit " limit
+.RS 0
+.PP
+Same as the \fBobuflimit\fP command except that the default setting for new displays is changed. Initial setting is 256 bytes.
+Note that you can use the special 'OL' terminal capability if you
+want to have a dependency on the terminal type.
+.RE
+.TP
+.BI "defscrollback " num
+.RS 0
+.PP
+Same as the \fBscrollback\fP command except that the default setting for new 
+windows is changed. Initial setting is 100.
+.RE
+.TP
+.BI "defshell " command
+.RS 0
+.PP
+Synonym to the \fBshell\fP .screenrc command. See there.
+.RE
+.TP
+.BR "defsilence [ on | off ]"
+.RS 0
+.PP
+Same as the \fBsilence\fP command except that the default setting for new
+windows is changed. Initial setting is `off'.
+.RE
+.TP
+.BI "defslowpaste " msec
+.RS 0
+.PP
+Same as the \fBslowpaste\fP command except that the default setting for new
+windows is changed. Initial setting is 0 milliseconds, meaning `off'.
+.RE
+.TP
+.BR "defutf8 [ on | off ]"
+.RS 0
+.PP
+Same as the \fButf8\fP command except that the default setting for new
+windows is changed. Initial setting is `on' if screen was started with
+\*Q\-U\*U, otherwise `off'.
+.RE
+.TP
+.BR "defwrap [ on | off ]"
+.RS 0
+.PP
+Same as the \fBwrap\fP command except that the default setting for new 
+windows is changed. Initially line-wrap is on and can be toggled with the 
+\*Qwrap\*U command (\*QC-a r\*U) or by means of "C-a : wrap on|off".
+.RE
+.TP
+.BR "defwritelock [ on | off | auto ]"
+.RS 0
+.PP
+Same as the \fBwritelock\fP command except that the default setting for new 
+windows is changed. Initially writelocks will off.
+.RE
+.TP
+.BR "detach " [ \-h ]
+.RS 0
+.PP
+Detach the 
+.I screen
+session (disconnect it from the terminal and put it into the background).
+This returns you to the shell where you invoked
+.IR screen .
+A detached
+.I screen
+can be resumed by invoking
+.I screen
+with the
+.B \-r
+option (see also section \*QCOMMAND-LINE OPTIONS\*U). The
+.B \-h
+option tells screen to immediately close the connection to the
+terminal (\*Qhangup\*U).
+.RE
+.TP
+.B dinfo
+.RS 0
+.PP
+Show what screen thinks about your terminal. Useful if you want to know
+why features like color or the alternate charset don't work.
+.RE
+.TP
+.B displays
+.RS 0
+.PP
+Shows a tabular listing of all currently connected user front-ends (displays).
+This is most useful for multiuser sessions.
+The following keys can be used in displays list:
+.PP
+.TS
+tab(@);
+l l.
+_
+\fBk\fP, \fBC-p\fP, or \fBup\fP@Move up one line.
+_
+\fBj\fP, \fBC-n\fP, or \fBdown\fP@Move down one line.
+_
+\fBC-a\fP or \fBhome\fP@Move to the first line.
+_
+\fBC-e\fP or \fBend\fP@Move to the last line.
+_
+\fBC-u\fP or \fBC-d\fP@Move one half page up or down.
+_
+\fBC-b\fP or \fBC-f\fP@Move one full page up or down.
+_
+\fBmouseclick\fP@T{
+Move to the selected line. Available
+when \*Qmousetrack\*U is set to on.
+T}
+_
+\fBspace\fP@Refresh the list
+_
+\fBd\fP@Detach that display
+_
+\fBD\fP@Power detach that display
+_
+\fBC-g\fP, \fBenter\fP, or \fBescape\fP@Exit the list
+_
+.TE
+.PP
+The following is an example of what \*Qdisplays\*U could look like:
+.RS
+.nf
+\fC
+xterm 80x42 jnweiger@/dev/ttyp4     0(m11)   &rWx
+facit 80x24 mlschroe@/dev/ttyhf nb 11(tcsh)   rwx
+xterm 80x42 jnhollma@/dev/ttyp5     0(m11)   &R.x
+ (A)   (B)     (C)     (D)     (E) (F)(G)   (H)(I)
+\fR
+.fi
+.RE
+.PP
+The legend is as follows:
+.IP
+(A) The terminal type known by screen for this display.
+.IP
+(B) Displays geometry as width x height.
+.IP
+(C) Username who is logged in at the display.
+.IP
+(D) Device name of the display or the attached device
+.IP
+(E) Display is in blocking or nonblocking mode.
+The available modes are "nb", "NB", "Z<", "Z>", and "BL".
+.IP
+(F) Number of the window
+.IP
+(G) Name/title of window
+.IP
+(H) Whether the window is shared
+.IP
+(I) Window permissions. Made up of three characters.
+.TS
+allbox tab(:);
+csssss
+cs cs cs
+l l l l l l.
+Window permissions indicators
+1st character:2nd character:3rd character
+\fB\-\fR:no read:\fB\-\fR:no write:\fB\-\fR:no execute
+\fBr\fR:read:\fBw\fR:write:\fBx\fR:execute
+::\fBW\fR:own wlock::
+.T&
+lsssss
+l l l l l l.
+Indicators of permissions suppressed by a foreign wlock
+\fBR\fR:read only:\fB.\fR:no write::
+.TE
+.PP
+.RS
+\*Qdisplays\*U needs a region size of at least 10 characters wide and 5 characters high in
+order to display.
+.RE
+.TP
+.IR "\fBdigraph\fR " [ preset [ unicode-value ]]
+.RS 0
+.PP
+This command prompts the user for a digraph sequence. The next
+two characters typed are looked up in a builtin table and the
+resulting character is inserted in the input stream. For example,
+if the user enters 'a"', an a-umlaut will be inserted. If the
+first character entered is a 0 (zero),
+.I screen
+will treat the following characters (up to three) as an octal
+number instead.  The optional argument
+.I preset
+is treated as user input, thus one can create an \*Qumlaut\*U key.
+For example the command "bindkey ^K digraph '"'" enables the user
+to generate an a-umlaut by typing CTRL-K a.
+When a non-zero
+.I unicode-value
+is specified, a new digraph is created with the specified preset. The digraph is unset
+if a zero value is provided for the
+.I unicode-value.
+.RE
+.TP
+.B dumptermcap
+.RS 0
+.PP
+Write the termcap entry for the virtual terminal optimized for the currently
+active window to the file \*Q.termcap\*U in the user's 
+\*Q$HOME/.screen\*U directory (or wherever 
+.I screen
+stores its sockets. See the \*QFILES\*U section below).
+This termcap entry is identical to the value of the environment variable
+$TERMCAP that is set up by
+.I screen
+for each window. For terminfo based systems you will need to run a converter
+like 
+.IR captoinfo
+and then compile the entry with 
+.IR tic .
+.RE
+.TP
+.BR "dynamictitle [ on | off ]"
+.RS 0
+.PP
+Change behaviour for windows regarding if screen should change window title
+when seeing proper escape sequence. See also "TITLES (naming windows)" section.
+.RE
+.TP
+.BR "echo " [ \-n ] " \fImessage\fP"
+.RS 0
+.PP
+The echo command may be used to annoy 
+.I screen
+users with a 'message of the
+day'. Typically installed in a global /local/etc/screenrc. 
+The option \*Q\-n\*U may be used to suppress the line feed.
+See also \*Qsleep\*U.
+Echo is also useful for online checking of environment variables.
+.RE
+.TP
+.BI "encoding " "enc " \fR[\fP enc \fR]\fP
+.RS 0
+.PP
+Tell 
+.I screen 
+how to interpret the input/output. The first argument
+sets the encoding of the current window. Each window can emulate
+a different encoding. The optional second parameter overwrites
+the encoding of the connected terminal. It should never be
+needed as screen uses the locale setting to detect the encoding.
+There is also a way to select a terminal encoding depending on
+the terminal type by using the \*QKJ\*U termcap entry.
+.PP
+Supported encodings are eucJP, SJIS, eucKR, eucCN, Big5, GBK,
+KOI8-R, KOI8-U, CP1251, UTF-8,
+ISO8859-2, ISO8859-3, ISO8859-4, ISO8859-5, ISO8859-6,
+ISO8859-7, ISO8859-8, ISO8859-9, ISO8859-10, ISO8859-15, jis.
+.PP
+See also \*Qdefencoding\*U, which changes the default setting of a new
+window.
+.RE
+.TP
+.BI "escape " xy
+.RS 0
+.PP
+Set the command character to \fIx\fP and the character generating a literal
+command character (by triggering the \*Qmeta\*U command) to \fIy\fP (similar
+to the \-e option).
+Each argument is either a single character, a two-character sequence
+of the form \*Q^x\*U (meaning \*QC-x\*U), a backslash followed by an octal
+number (specifying the ASCII code of the character), or a backslash followed
+by a second character, such as \*Q\e^\*U or \*Q\e\e\*U.
+The default is \*Q^Aa\*U.
+.RE
+.TP
+.RI "\fBeval\fP " command1 [ "command2 ..." ]
+.RS 0
+.PP
+Parses and executes each argument as separate command.
+.RE
+.TP
+.IR "\fBexec\fP " [[ fdpat ] "newcommand " [ "args ..." ]]
+.RS 0
+.PP
+Run a unix subprocess (specified by an executable path \fInewcommand\fP and its 
+optional arguments) in the current window. The flow of data between 
+newcommands stdin/stdout/stderr, the process originally started in the window 
+(let us call it "application-process") and screen itself (window) is 
+controlled by the file descriptor pattern fdpat.
+This pattern is basically a three character sequence representing stdin, stdout
+and stderr of newcommand. A dot (.) connects the file descriptor
+to
+.IR screen .
+An exclamation mark (!) causes the file
+descriptor to be connected to the application-process. A colon (:) combines
+both.
+User input will go to newcommand unless newcommand receives the 
+application-process' 
+output (fdpats first character is `!' or `:') or a pipe symbol (|) is added 
+(as a fourth character) to the end of fdpat.
+.PP
+Invoking `exec' without arguments shows name and arguments of the currently
+running subprocess in this window. Only one subprocess a time can be running
+in each window.
+.PP
+When a subprocess is running the `kill' command will affect it instead of the
+windows process.
+.PP
+Refer to the postscript file `doc/fdpat.ps' for a confusing illustration
+of all 21 possible combinations. Each drawing shows the digits 2,1,0
+representing the three file descriptors of newcommand. The box marked
+`W' is the usual pty that has the application-process on its slave side.
+The box marked `P' is the secondary pty that now has
+.I screen
+at its master side.
+.PP
+Abbreviations: Whitespace between the word `exec' and fdpat and the
+command can be omitted. Trailing dots and a fdpat consisting only of
+dots can be omitted. A simple `|' is synonymous for the pattern
+`!..|'; the word exec can be omitted here and can always be replaced
+by `!'.
+.PP
+Examples:
+.RS
+.TP
+exec ... /bin/sh
+.TP
+exec /bin/sh
+.TP
+!/bin/sh
+.sp
+Creates another shell in the same window, while the original shell is still 
+running. Output of both shells is displayed and user input is sent to the new
+/bin/sh.
+.TP
+exec !.. stty 19200
+.TP
+exec ! stty 19200
+.TP
+!!stty 19200
+.sp 1
+Set the speed of the window's tty. If your stty command operates on stdout, 
+then add another `!'.
+.TP
+exec !..| less
+.TP
+|less
+.sp 1
+This adds a pager to the window output. The special character `|' is needed to
+give the user control over the pager although it gets its input from the 
+window's process. This works, because
+.I less
+listens on stderr (a behavior that
+.I screen
+would not expect without the `|') 
+when its stdin is not a tty. 
+.I Less 
+versions newer than 177 fail miserably here; good old
+.I pg
+still works.
+.TP
+!:sed \-n s/.*Error.*/\e007/p
+.sp 1
+Sends window output to both, the user and the sed command. The sed inserts an
+additional bell character (oct. 007) to the window output seen by
+.IR screen .
+This will cause "Bell in window x" messages, whenever the string "Error"
+appears in the window.
+.RE
+.RE
+.TP
+.B fit
+.RS 0
+.PP
+Change the window size to the size of the current region. This
+command is needed because screen doesn't adapt the window size
+automatically if the window is displayed more than once.
+.RE
+.TP
+.BR "flow [ on | off | auto]"
+.RS 0
+.PP
+Sets the flow-control mode for this window.
+Without parameters it cycles the current window's flow-control setting from 
+"automatic" to "on" to "off".
+See the discussion on \*QFLOW-CONTROL\*U later on in this document for full 
+details and note, that this is subject to change in future releases.
+Default is set by `defflow'.
+.RE
+.TP
+.BR "focus [ next | prev | up | down | left | right | top | bottom ]"
+.RS 0
+.PP
+Move the input focus to the next region. This is done in a cyclic
+way so that the top left region is selected after the bottom right
+one. If no option is given it defaults to `next'. The next
+region to be selected is determined by how the regions are layered.
+Normally, the next region in the same layer would be selected.
+However, if that next region contains one or more layers, the first
+region in the highest layer is selected first. If you are at the
+last region of the current layer, `next' will move the focus
+to the next region in the lower layer (if there is a lower layer).
+`Prev' cycles in the opposite order. See \*Qsplit\*U for more
+information about layers.
+
+The rest of the options (`up', `down', `left',
+`right', `top', and `bottom') are more indifferent
+to layers. The option `up' will move the focus upward to the
+region that is touching the upper left corner of the current region.
+`Down' will move downward to the region that is touching the
+lower left corner of the current region. The option `left'
+will move the focus leftward to the region that is touching the
+upper left corner of the current region, while `right' will
+move rightward to the region that is touching the upper right corner
+of the current region. Moving left from a left most region or moving
+right from a right most region will result in no action.
+
+The option `top' will move the focus to the very first region
+in the upper list corner of the screen, and `bottom' will move
+to the region in the bottom right corner of the screen. Moving up from
+a top most region or moving down from a bottom most region will result
+in no action.
+
+Useful bindings are (h, j, k, and l as in vi)
+.nf
+    bind h focus left
+    bind j focus down
+    bind k focus up
+    bind l focus right
+    bind t focus top
+    bind b focus bottom
+.fi
+Note that \fBk\fP is traditionally bound to the \fIkill\fP command.
+.RE
+.TP
+.BI "focusminsize [ ( " width "|max|_ ) ( " height "|max|_ ) ]"
+.RS 0
+.PP
+This forces any currently selected region to be automatically
+resized at least a certain \fIwidth\fP and \fIheight\fP. All
+other surrounding regions will be resized in order to accommodate.
+This constraint follows every time the \*Qfocus\*U command is
+used. The \*Qresize\*U command can be used to increase either
+dimension of a region, but never below what is set with
+\*Qfocusminsize\*U. The underscore `_' is a synonym for
+\fBmax\fP. Setting a \fIwidth\fP and \fIheight\fP of `0 0'
+(zero zero) will undo any constraints and allow for manual resizing.
+Without any parameters, the minimum width and height is shown.
+.RE
+.TP
+.BR "gr [ on | off ]"
+.RS 0
+.PP
+Turn GR charset switching on/off. Whenever screen sees an input
+character with the 8th bit set, it will use the charset stored in the
+GR slot and print the character with the 8th bit stripped. The
+default (see also \*Qdefgr\*U) is not to process GR switching because
+otherwise the ISO88591 charset would not work.
+.RE
+.TP
+.IR "\fBgroup\fP " [ grouptitle ]
+.RS 0
+.PP
+Change or show the group the current window belongs to. Windows can
+be moved around between different groups by specifying the name of
+the destination group. Without specifying a group, the title of the
+current group is displayed.
+.RE
+.TP
+.IR "\fBhardcopy\fP " [ \-h "] [" file ]
+.RS 0
+.PP
+Writes out the currently displayed image to the file \fIfile\fP,
+or, if no filename is specified, to \fIhardcopy.n\fP in the
+default directory, where \fIn\fP is the number of the current window. 
+This either appends or overwrites the file if it exists. See below.
+If the option \fB\-h\fP is specified, dump also the contents of the
+scrollback buffer.
+.RE
+.TP
+.BR "hardcopy_append [ on | off ]"
+.RS 0
+.PP
+If set to "on", 
+.I screen
+will append to the "hardcopy.n" files created by the command \*QC-a h\*U, 
+otherwise these files are overwritten each time.
+Default is `off'.
+.RE
+.TP
+.BI "hardcopydir "directory
+.RS 0
+.PP
+Defines a directory where hardcopy files will be placed. If unset, hardcopys
+are dumped in
+.IR screen 's
+current working directory.
+.RE
+.TP
+.BR "hardstatus [ on | off ]"
+.TP
+.BR "hardstatus [ always ] firstline | lastline | message | ignore [ string ]"
+.TP
+.BR "hardstatus string [ string ]"
+.RS 0
+.PP
+This command configures the use and emulation of the terminal's
+hardstatus line. The first form
+toggles whether
+.I screen
+will use the hardware status line to display messages. If the
+flag is set to `off', these messages
+are overlaid in reverse video mode at the display line. The default
+setting is `on'.
+.P
+The second form tells 
+.I screen 
+what to do if the terminal doesn't
+have a hardstatus line (i.e. the termcap/terminfo capabilities
+"hs", "ts", "fs" and "ds" are not set).
+When \*Qfirstline/lastline\*U is used, 
+.I screen 
+will reserve the first/last line of the display for
+the hardstatus. \*Qmessage\*U uses 
+.I screen's
+message mechanism and
+\*Qignore\*U tells 
+.I screen 
+never to display the hardstatus.
+If you prepend the word \*Qalways\*U to the type (e.g., \*Qalwayslastline\*U), 
+.I screen 
+will use the type even if the terminal supports a hardstatus.
+.P
+The third form specifies the contents of the hardstatus line.  '%h' is
+used as default string, i.e., the stored hardstatus of the current
+window (settable via \*QESC]0;<string>^G\*U or \*QESC_<string>ESC\e\*U)
+is displayed.  You can customize this to any string you like including
+the escapes from the \*QSTRING ESCAPES\*U chapter. If you leave out
+the argument
+.IR string ,
+the current string is displayed.
+.P
+You can mix the second and third form by providing the string as
+additional argument.
+.RE
+.TP
+.BR "height " [ \-w | \-d "] [" \fIlines\fR " [" \fIcols\fR ]]
+.RS 0
+.PP
+Set the display height to a specified number of lines. When no argument
+is given it toggles between 24 and 42 lines display. You can also
+specify a width if you want to change both values.
+The
+.B \-w
+option tells screen to leave the display size unchanged and just set
+the window size,
+.B \-d
+vice versa.
+.RE
+.TP
+.BR help [ \fIclass\fP ]
+.RS 0
+.PP
+Not really a online help, but displays a help
+.I screen 
+showing you all the key bindings.
+The first pages list all the internal commands followed by their current
+bindings.
+Subsequent pages will display the custom commands, one command per key.
+Press space when you're done reading each page, or return to exit early.
+All other characters are ignored. If the \*Q\-c\*U option is given,
+display all bound commands for the specified command class.
+See also \*QDEFAULT KEY BINDINGS\*U section.
+.RE
+.TP
+.B history
+.RS 0
+.PP
+Usually users work with a shell that allows easy access to previous commands.
+For example csh has the command \*Q!!\*U to repeat the last command executed. 
+.I Screen
+allows you to have a primitive way of re-calling \*Qthe command that
+started ...\*U: You just type the first letter of that command, then hit
+`C-a {' and
+.I screen
+tries to find a previous line that matches with the `prompt character' 
+to the left of the cursor. This line is pasted into this window's input queue.
+Thus you have a crude command history (made up by the visible window and its
+scrollback buffer). 
+.RE
+.TP
+.BI "hstatus " status
+.RS 0
+.PP
+Change the window's hardstatus line to the string \fIstatus\fP.
+.RE
+.TP
+.IR "\fBidle\fR " [ timeout [ "cmd-args" ]]
+.RS 0
+.PP
+Sets a command that is run after the specified number of seconds
+inactivity is reached. This command will normally be the \*Qblanker\*U
+command to create a screen blanker, but it can be any screen command.
+If no command is specified, only the timeout is set. A timeout of
+zero (or the special timeout \fBoff\fP) disables the timer.
+If no arguments are given, the current settings are displayed.
+.RE
+.TP
+.BR "ignorecase [ on | off ]"
+.RS 0
+.PP
+Tell screen to ignore the case of characters in searches. Default is
+`off'. Without any options, the state of ignorecase is toggled.
+.RE
+.TP
+.B info
+.RS 0
+.PP
+Uses the message line to display some information about the current window:
+the cursor position in the form \*Q(column,row)\*U starting with \*Q(1,1)\*U,
+the terminal width and height plus the size of the scrollback buffer in lines, 
+like in \*Q(80,24)+50\*U, the current state of window XON/XOFF flow control
+is shown like this (See also section FLOW CONTROL):
+.TS
+allbox tab(@);
+l l.
++flow@automatic flow control, currently on.
+\-flow@automatic flow control, currently off.
++(+)flow@flow control enabled. Agrees with automatic control.
+\-(+)flow@flow control disabled. Disagrees with automatic control.
++(\-)flow@flow control enabled. Disagrees with automatic control.
+\-(\-)flow@flow control disabled. Agrees with automatic control.
+.TE
+
+The current line wrap setting (`+wrap' indicates enabled, `\-wrap' not) is
+also shown. The flags `ins', `org', `app', `log', `mon' or `nored' are 
+displayed when the window is in insert mode, origin mode, 
+application-keypad mode, has output logging,
+activity monitoring or partial redraw enabled.
+
+The currently active character set (\fIG0\fP, \fIG1\fP, \fIG2\fP,
+or \fIG3\fP) and in square brackets the terminal character sets that are
+currently designated as \fIG0\fP through \fIG3\fP is shown. If the window
+is in UTF-8 mode, the string \*QUTF-8\*U is shown instead.
+
+Additional modes depending on the type of the window are displayed at the end of the status line (See also chapter \*QWINDOW TYPES\*U).
+.PP
+If the state machine of the terminal emulator is in a non-default state,
+the info line is started with a string identifying the current state.
+.PP
+For system information use the \*Qtime\*U command.
+.RE
+.TP
+.BR ins_reg " [" \fIkey ]
+.RS 0
+.PP
+No longer exists, use \*Qpaste\*U instead.
+.RE
+.TP
+.B kill
+.RS 0
+.PP
+Kill current window.
+.PP
+If there is an `exec' command running then it is killed. Otherwise the process
+(shell) running in the window receives a HANGUP condition, 
+the window structure is removed and 
+.I screen 
+(your display) switches to another window.  When the last window is destroyed,
+.I screen
+exits.
+After a kill 
+.I screen 
+switches to the previously displayed window.
+.PP
+Note:
+.I Emacs
+users should keep this command in mind, when killing a line.
+It is recommended not to use \*QC-a\*U as the
+.I screen
+escape key or to rebind kill to \*QC-a K\*U.
+.RE
+.TP
+.B lastmsg
+.RS 0
+.PP
+Redisplay the last contents of the message/status line.
+Useful if you're typing when a message appears, because  the message goes 
+away when you press a key (unless your terminal has a hardware status line).
+Refer to the commands \*Qmsgwait\*U and \*Qmsgminwait\*U for fine tuning.
+.RE
+.TP
+.BR "layout new " [\fItitle\fP]
+.RS 0
+.PP
+Create a new layout. The screen will change to one whole region
+and be switched to the blank window. From here, you build the
+regions and the windows they show as you desire. The new layout
+will be numbered with the smallest available integer, starting
+with zero. You can optionally give a title to your new layout.
+Otherwise, it will have a default title of \*Qlayout\*U. You
+can always change the title later by using the command
+\fBlayout title\fP.
+.RE
+.TP
+.BR "layout remove " [\fIn|title\fP]
+.RS 0
+.PP
+Remove, or in other words, delete the specified layout. Either
+the number or the title can be specified. Without either
+specification, \fIscreen\fP will remove the current layout.
+
+Removing a layout does not affect your set windows or regions.
+.RE
+.TP
+.B layout next
+.RS 0
+.PP
+Switch to the next layout available
+.RE
+.TP
+.B layout prev
+.RS 0
+.PP
+Switch to the previous layout available
+.RE
+.TP
+.BR "layout select " [\fIn|title\fP]
+.RS 0
+.PP
+Select the desired layout. Either the number or the title can
+be specified. Without either specification, \fIscreen\fP will
+prompt and ask which screen is desired. To see which layouts are
+available, use the \fBlayout show\fP command.
+.RE
+.TP
+.B layout show
+.RS 0
+.PP
+List on the message line the number(s) and title(s) of the available
+layout(s). The current layout is flagged.
+.RE
+.TP
+.BR "layout title " [\fItitle\fP]
+.RS 0
+.PP
+Change or display the title of the current layout. A string given
+will be used to name the layout. Without any options, the current
+title and number is displayed on the message line.
+.RE
+.TP
+.BR "layout number " [\fIn\fP]
+.RS 0
+.PP
+Change or display the number of the current layout. An integer given
+will be used to number the layout. Without any options, the current
+number and title is displayed on the message line.
+.RE
+.TP
+.BR "layout attach " [\fItitle\fP|\fB:last\fP]
+.RS 0
+.PP
+Change or display which layout to reattach back to. The default is
+\fB:last\fP, which tells \fIscreen\fP to reattach back to the last
+used layout just before detachment. By supplying a title, You can
+instruct \fIscreen\fP to reattach to a particular layout regardless
+which one was used at the time of detachment. Without any options,
+the layout to reattach to will be shown in the message line.
+.RE
+.TP
+.BR "layout save " [\fIn|title\fP]
+.RS 0
+.PP
+Remember the current arrangement of regions. When used, \fIscreen\fP
+will remember the arrangement of vertically and horizontally split
+regions. This arrangement is restored when a \fIscreen\fP session
+is reattached or switched back from a different layout. If the
+session ends or the \fIscreen\fP process dies, the layout
+arrangements are lost. The \fBlayout dump\fP command should help
+in this siutation. If a number
+or title is supplied, \fIscreen\fP will remember the arrangement of
+that particular layout. Without any options, \fIscreen\fP will
+remember the current layout.
+
+Saving your regions can be done automatically by using the
+\fBlayout autosave\fP command.
+.RE
+.TP
+.BR "layout autosave [ on | off]"
+.RS 0
+.PP
+Change or display the status of automatcally saving layouts. The
+default is \fBon\fP, meaning when \fIscreen\fP is detached or
+changed to a different layout, the arrangement of regions and windows
+will be remembered at the time of change and restored upon return.
+If autosave is set to \fBoff\fP, that arrangement will only be
+restored to either to the last manual save, using \fBlayout save\fP,
+or to when the layout was first created, to a single region with
+a single window. Without either an \fBon\fP or \fBoff\fP, the
+current status is displayed on the message line.
+.RE
+.TP
+.BR "layout dump " [\fIfilename\fP]
+.RS 0
+.PP
+Write to a file the order of splits made in the current layout. This 
+is useful to recreate the order of your regions used in your current
+layout. Only the current layout is recorded. While the order of the
+regions are recorded, the sizes of those regions and which windows
+correspond to which regions are not. If no filename is specified,
+the default is \fIlayout-dump\fP, saved in the directory that the
+\fIscreen\fP process was started in. If the file already exists,
+\fBlayout dump\fP will append to that file. As an example:
+.PP
+.nf
+	C-a : layout dump /home/user/.screenrc
+.fi
+.PP
+will save or append the layout to the user's \fI.screenrc\fP file.
+.RE
+.TP
+.B license
+.RS 0
+.PP
+Display the disclaimer page. This is done whenever
+.I screen
+is started without options, which should be often enough. See also 
+the \fBstartup_message\fP command.
+.RE
+.TP
+.B lockscreen
+.RS 0
+.PP
+Lock this display.
+Call a screenlock program (/local/bin/lck or /usr/bin/lock or a builtin if no
+other is available). Screen does not accept any command keys until this program
+terminates. Meanwhile processes in the windows may continue, as the windows 
+are in the `detached' state. The screenlock program may be changed through the
+environment variable $LOCKPRG (which must be set in the shell from which 
+.I screen
+is started) and is executed with the user's uid and gid.
+.PP
+Warning: 
+When you leave other shells unlocked and you have no password set on           
+.IR screen ,
+the lock is void: One could easily re-attach from an unlocked
+shell. This feature should rather be called `lockterminal'.
+.RE
+.TP
+.BR "log [ on | off ]"
+.RS 0
+.PP
+Start/stop writing output of the current window to a file 
+\*Qscreenlog.\fIn\fP\*U in the window's default directory, where \fIn\fP 
+is the number of the current window. This filename can be changed with
+the `logfile' command. If no parameter is given, the state
+of logging is toggled. The session log is appended to the previous contents 
+of the file if it already exists. The current contents and the contents 
+of the scrollback history are not included in the session log.
+Default is `off'.
+.RE
+.TP
+.BI "logfile " filename
+.TP
+.BI "logfile flush " secs
+.RS 0
+.PP
+Defines the name the log files will get. The default is
+\*Qscreenlog.%n\*U. The second form changes the number of seconds
+.I screen
+will wait before flushing the logfile buffer to the file-system. The
+default value is 10 seconds.
+.RE
+.TP
+.BR "login [ on | off ]"
+.RS 0
+.PP
+Adds or removes the entry in the utmp database file for the current window.
+This controls if the window is `logged in'.
+When no parameter is given, the login state of the window is toggled.
+Additionally to that toggle, it is convenient having a `log in' and a `log out'
+key. E.\|g. `bind I login on' and `bind O login off' will map these
+keys to be C-a I and C-a O.
+The default setting (in config.h.in) should be \*Qon\*U for a 
+.I screen
+that runs under suid-root.
+Use the \*Qdeflogin\*U command to change the default login state for new 
+windows. Both commands are only present when 
+.I screen
+has been compiled with utmp support.
+.RE
+.TP
+.BR "logtstamp " [ on | off ]
+.TP
+.IR "\fBlogtstamp after\fR " [ secs ]
+.TP
+.B "logtstamp string"
+.RS 0
+.RI [ string ]
+.PP
+This command controls logfile time-stamp mechanism of 
+.I screen.
+If
+time-stamps are turned \*Qon\*U, 
+.I screen 
+adds a string containing
+the current time to the logfile after two minutes of inactivity.
+When output continues and more than another two minutes have passed,
+a second time-stamp is added to document the restart of the
+output. You can change this timeout with the second form
+of the command. The third form is used for customizing the time-stamp
+string (`\-\- %n:%t \-\- time-stamp \-\- %M/%d/%y %c:%s \-\-\\n' by
+default).
+.RE
+.TP
+.B mapdefault
+.RS 0
+.PP
+Tell 
+.I screen 
+that the next input character should only be looked up
+in the default bindkey table. See also \*Qbindkey\*U.
+.RE
+.TP
+.B mapnotnext
+.RS 0
+.PP
+Like mapdefault, but don't even look in the default bindkey table.
+.RE
+.TP
+.IR "\fImaptimeout\fR " [ timeout ]
+.RS 0
+.PP
+Set the inter-character timer for input sequence detection to a timeout
+of
+.I timeout
+ms. The default timeout is 300ms. Maptimeout with no arguments shows
+the current setting.
+See also \*Qbindkey\*U.
+.RE
+.TP
+.BI "markkeys " string
+.RS 0
+.PP
+This is a method of changing the keymap used for copy/history mode.
+The string is made up of \fIoldchar\fP=\fInewchar\fP pairs which are
+separated by `:'. Example: The string \*QB=^B:F=^F\*U will change the 
+keys `C-b' and `C-f' to the vi style binding (scroll up/down fill page).
+This happens to be the default binding for `B' and `F'.
+The command \*Qmarkkeys h=^B:l=^F:$=^E\*U would set the mode for an emacs-style
+binding.
+If your terminal sends characters, that cause you to abort copy mode,
+then this command may help by binding these characters to do nothing.
+The no-op character is `@' and is used like this: \*Qmarkkeys
+@=L=H\*U if you do not want to use the `H' or `L' commands any longer.
+As shown in this example, multiple keys can be assigned to one function in a 
+single statement.
+.RE
+.TP
+.BI "maxwin " num
+.RS 0
+.PP
+Set the maximum window number screen will create. Doesn't affect
+already existing windows. The number can be increased only when there are no
+existing windows.
+.RE
+.TP
+.B meta
+.RS 0
+.PP
+Insert the command character (C-a) in the current window's input stream.
+.RE
+.TP
+.BR "monitor [ on | off ]"
+.RS 0
+.PP
+Toggles activity monitoring of windows.
+When monitoring is turned on and an affected window is switched into the
+background, you will receive the activity notification message in the
+status line at the first sign of output and the window will also be marked
+with an `@' in the window-status display.
+Monitoring is initially off for all windows.
+.RE
+.TP
+.BR "mousetrack [ on | off ]"
+.RS 0
+.PP
+This command determines whether
+.I screen
+will watch for
+mouse clicks. When this command is enabled, regions that have
+been split in various ways can be selected by pointing to them
+with a mouse and left-clicking them. Without specifying \fBon\fP
+or \fBoff\fP, the current state is displayed. The default state
+is determined by the \fBdefmousetrack\fP command.
+.RE
+.TP
+.BI "msgminwait " sec
+.RS 0
+.PP
+Defines the time 
+.I screen 
+delays a new message when one message is currently displayed. 
+The default is 1 second.
+.RE
+.TP
+.BI "msgwait " sec
+.RS 0
+.PP
+Defines the time a message is displayed if 
+.I screen
+is not disturbed by other activity. The default is 5 seconds.
+.RE
+.TP
+.BR "multiuser [ on | off ]"
+.RS 0
+.PP
+Switch between singleuser and multiuser mode. Standard
+.I screen
+operation is singleuser. In multiuser mode the commands `acladd',
+`aclchg', `aclgrp' and `acldel'
+can be used to enable (and disable) other users accessing this 
+.I screen
+session. 
+.RE
+.TP
+.BR "nethack [ on | off ]"
+.RS 0
+.PP
+Changes the kind of error messages used by
+.IR screen .
+When you are familiar with the game \*Qnethack\*U, you may enjoy the
+nethack-style messages which will often blur the facts a little, but are
+much funnier to read. Anyway, standard messages often tend to be unclear as
+well.
+.br
+This option is only available if
+.I screen
+was compiled with the NETHACK flag defined. The
+default setting is then determined by the presence of the environment 
+variable $NETHACKOPTIONS and the file ~/.nethackrc - if either one is present,
+the default is \fBon\fP.
+.RE
+.TP
+.B next
+.RS 0
+.PP
+Switch to the next window.
+This command can be used repeatedly to cycle through the list of windows.
+.RE
+.PP
+.BR "nonblock [ on | off | numsecs ]"
+.RS 0
+.PP
+Tell screen how to deal with user interfaces (displays) that cease to
+accept output. This can happen if a user presses ^S or a TCP/modem
+connection gets cut but no hangup is received. If nonblock is
+\fBoff\fP (this is the default) screen waits until the display
+restarts to accept the output. If nonblock is \fBon\fP, screen
+waits until the timeout is reached (\fBon\fP is treated as 1s). If the
+display still doesn't receive characters, screen will consider
+it \*Qblocked\*U and stop sending characters to it. If at
+some time it restarts to accept characters, screen will unblock
+the display and redisplay the updated window contents.
+.RE
+.TP
+.BR "number " [[+|\-] \fIn ]
+.RS 0
+.PP
+Change the current window's number. If the given number \fIn\fP is already 
+used by another window, both windows exchange their numbers. If no argument is
+specified, the current window number (and title) is shown. Using `+' or `\-'
+will change the window's number by the relative amount specified.
+.RE
+.TP
+.BR "obuflimit " [ \fIlimit ]
+.RS 0
+.PP
+If the output buffer contains more bytes than the specified limit, no
+more data will be
+read from the windows. The default value is 256. If you have a fast
+display (like xterm), you can set it to some higher value. If no
+argument is specified, the current setting is displayed.
+.RE
+.TP
+.B only
+.RS 0
+.PP
+Kill all regions but the current one.
+.RE
+.TP
+.B other
+.RS 0
+.PP
+Switch to the window displayed previously. If this window does no longer exist,
+\fIother\fP has the same effect as \fInext\fP.
+.RE
+.TP
+.BR "partial [ on | off ]"
+.RS 0
+.PP
+Defines whether the display should be refreshed (as with \fIredisplay\fP) after
+switching to the current window. This command only affects the current window.
+To immediately affect all windows use the \fIallpartial\fP command.
+Default is `off', of course.  This default is fixed, as there is currently no 
+\fIdefpartial\fP command.
+.RE
+.TP
+.BR "password " [ \fIcrypted_pw ]
+.RS 0
+.PP
+Present a crypted password in your \*Q.screenrc\*U file and
+.I screen
+will ask for it, whenever someone attempts to resume a detached.
+This is useful if you have privileged programs running under
+.I screen
+and you want to protect your session from reattach attempts by another user
+masquerading as your uid (i.e. any superuser.)
+If no crypted password is specified,
+.I screen
+prompts twice for typing a
+password and places its encryption in the paste buffer.
+Default is `none', this disables password checking.
+.RE
+.TP
+.IR "\fBpaste\fR " [ registers " [" dest_reg ]]
+.RS 0
+.PP
+Write the (concatenated) contents of the specified registers to the stdin queue
+of the current window. The register '.' is treated as the
+paste buffer. If no parameter is given the user is prompted for a single 
+register to paste.
+The paste buffer can be filled with the \fBcopy\fP, \fBhistory\fP and
+\fBreadbuf\fP commands.
+Other registers can be filled with the \fBregister\fP, \fBreadreg\fP and
+\fBpaste\fP commands.
+If \fBpaste\fP is called with a second argument, the contents of the specified
+registers is pasted into the named destination register rather than
+the window. If '.' is used as the second argument, the displays paste buffer is
+the destination.
+Note, that \fBpaste\fP uses a wide variety of resources: Whenever a second
+argument is specified no current window is needed. When the source specification
+only contains registers (not the paste buffer) then there need not be a current
+display (terminal attached), as the registers are a global resource. The
+paste buffer exists once for every user.
+.RE
+.TP
+.BR "pastefont [ on | off ]"
+.RS 0
+.PP
+Tell 
+.I screen 
+to include font information in the paste buffer. The
+default is not to do so. This command is especially useful for
+multi character fonts like kanji.
+.RE
+.TP
+.B pow_break
+.RS 0
+.PP
+Reopen the window's terminal line and send a break condition. See `break'.
+.RE
+.TP
+.B pow_detach
+.RS 0
+.PP
+Power detach. 
+Mainly the same as \fIdetach\fP, but also sends a HANGUP signal to
+the parent process of
+.IR screen .
+CAUTION: This will result in a logout, when 
+.I screen
+was started from your login-shell.
+.RE
+.TP
+.IR "\fBpow_detach_msg\fP " [ message ]
+.RS 0
+.PP
+The \fImessage\fP specified here is output whenever a `Power detach' was
+performed. It may be used as a replacement for a logout message or to reset 
+baud rate, etc. 
+Without parameter, the current message is shown.
+.RE
+.TP
+.B prev
+.RS 0
+.PP
+Switch to the window with the next lower number.
+This command can be used repeatedly to cycle through the list of windows.
+.RE
+.TP
+.IR "\fBprintcmd\fP " [ cmd ]
+.RS 0
+.PP
+If
+.I cmd
+is not an empty string, 
+.I screen 
+will not use the terminal capabilities
+\*Qpo/pf\*U if it detects an ansi print sequence
+.BR "ESC [ 5 i" ,
+but pipe the output into
+.IR cmd .
+This should normally be a command like \*Qlpr\*U or
+\*Q'cat > /tmp/scrprint'\*U.
+.B printcmd
+without a command displays the current setting.
+The ansi sequence
+.B "ESC \e"
+ends printing and closes the pipe.
+.PP
+Warning: Be careful with this command! If other user have write
+access to your terminal, they will be able to fire off print commands.
+.RE
+.TP
+.BR process " [" \fIkey ]
+.RS 0
+.PP
+Stuff the contents of the specified register into 
+.IR screen 's
+input queue. If no argument is given you are prompted for a
+register name. The text is parsed as if it had been typed in from the user's
+keyboard. This command can be used to bind multiple actions to a single key.
+.RE
+.TP
+.B quit
+.RS 0
+.PP
+Kill all windows and terminate
+.IR screen .
+Note that on VT100-style terminals the keys C-4 and C-\e are identical.
+This makes the default bindings dangerous:
+Be careful not to type C-a C-4 when selecting window no. 4.
+Use the empty bind command (as in \*Qbind '^\e'\*U) to remove a key binding.
+.RE
+.TP
+.IR "\fBreadbuf\fP " [ encoding "] [" filename ]
+.RS 0
+.PP
+Reads the contents of the specified file into the paste buffer.
+You can tell screen the encoding of the file via the \fB\-e\fP option.
+If no file is specified, the screen-exchange filename is used.
+See also \fBbufferfile\fP command.
+.RE
+.TP
+.IR "\fBreadreg\fP " [ encoding "] [" register " [" filename ]]
+.RS 0
+.PP
+Does one of two things, dependent on number of arguments: with zero or one
+arguments it duplicates the paste buffer contents into the register specified
+or entered at the prompt. With two arguments it reads the contents of the named 
+file into the register, just as \fIreadbuf\fP reads the screen-exchange file
+into the paste buffer.
+You can tell screen the encoding of the file via the \fB\-e\fP option.
+The following example will paste the system's password file into 
+the 
+.I screen 
+window (using register p, where a copy remains):
+.PP
+.nf
+	C-a : readreg p /etc/passwd
+	C-a : paste p
+.fi
+.RE
+.TP
+.B redisplay
+.RS 0
+.PP
+Redisplay the current window. Needed to get a full redisplay when in
+partial redraw mode.
+.RE
+.TP
+.RI "\fBregister\fP " \fR[\fP \fB\-e\fR encoding ] key-string
+.RS 0
+.PP
+Save the specified \fIstring\fP to the register \fIkey\fP.
+The encoding of the string can be specified via the \fB\-e\fP option.
+See also the \*Qpaste\*U command.
+.RE
+.TP
+.B "remove"
+.RS 0
+.PP
+Kill the current region. This is a no-op if there is only one region.
+.RE
+.TP
+.B "removebuf"
+.RS 0
+.PP
+Unlinks the screen-exchange file used by the commands
+\fBwritebuf\fP and \fBreadbuf\fP.
+.RE
+.TP
+.B "rendition [ bell | monitor | silence | so ] attr [ color ]"
+.RS 0
+.PP
+Change the way
+.I screen
+renders the titles of windows that have monitor or bell flags set in
+caption or hardstatus or windowlist. See the \*QSTRING ESCAPES\*U
+chapter for the syntax of the modifiers.
+The default for monitor is currently \*Q=b \*U (bold, active colors),
+for bell \*Q=ub \*U (underline, bold and active colors), and \*Q=u \*U
+for silence.
+.RE
+.TP
+.B "reset"
+.RS 0
+.PP 
+Reset the virtual terminal to its \*Qpower-on\*U values. Useful when strange
+settings (like scroll regions or graphics character set) are left over from
+an application.
+.RE
+.TP
+.B "resize"
+.RB [ -h | -v | -b | -l | -p ]
+.RB [[ + | - ]
+.IR n "[%]"
+.RB | = | max | min | _ | 0 ]
+.RS 0
+.PP 
+Resize the current region. The space will be removed from or added to
+the surrounding regions depending on the order of the splits.
+The available options for resizing are `-h'(horizontal),
+`-v'(vertical), `-b'(both), `-l'(local to layer),
+and `-p'(perpendicular). Horizontal resizes will add or remove width
+to a region, vertical will add or remove height, and both will add or
+remove size from both dimensions. Local and perpendicular are similar to
+horizontal and vertical, but they take in account of how a region was split.
+If a region's last split was horizontal, a local resize will work like a
+vertical resize. If a region's last split was vertical, a local resize will
+work like a horizontal resize. Perpendicular resizes work in opposite of
+local resizes. If no option is specified, local is the default.
+
+The amount of lines to add or remove can be expressed a couple of different
+ways. By specifying a number \fIn\fP by itself will resize the region by
+that absolute amount. You can specify a relative amount by prefixing a
+plus `+' or minus `-' to the amount, such as adding +\fIn\fP lines
+or removing -\fIn\fP lines. Resizing can also be expressed as an absolute
+or relative percentage by postfixing a percent sign `%'. Using zero
+`0' is a synonym for `min' and using an underscore `_' is a
+synonym for `max'.
+
+Some examples are:
+.TP
+resize +N
+increase current region by N
+.TP
+resize \-N
+decrease current region by N
+.TP
+resize  N
+set current region to N
+.TP
+resize 20%
+set current region to 20% of original size
+.TP
+resize +20%
+increase current region by 20%
+.TP
+resize -b =
+make all windows equally
+.TP
+resize  max
+maximize current region
+.TP
+resize  min
+minimize current region
+.PP
+Without any arguments,
+.I screen
+will prompt for how you would like to resize the current region.
+
+See \*Qfocusminsize\*U if you want to restrict the minimum size a region
+can have.
+.RE
+.RE
+.TP
+.B "screen \fP[\fI\-opts\fP] [\fIn\fP] [\fIcmd\fP [\fIargs\fP]|\fB//group\fP]"
+.RS 0
+.PP
+Establish a new window.
+The flow-control options (\fB\-f\fP, \fB\-fn\fP and \fB\-fa\fP),
+title (a.\|k.\|a.) option (\fB\-t\fP), login options (\fB\-l\fP and \fB\-ln\fP)
+, terminal type option (\fB\-T\fP <term>), the all-capability-flag (\fB\-a\fP)
+and scrollback option (\fB\-h\fP <num>) may be specified with each command.
+The option (\fB\-M\fP) turns monitoring on for this window.
+The option (\fB\-L\fP) turns output logging on for this window.
+If an optional number \fIn\fP in the range 0..MAXWIN-1 is given,
+the window number \fIn\fP is assigned to the newly created window
+(or, if this number is already in-use, the next available number).
+If a command is specified after \*Qscreen\*U, this command (with the given
+arguments) is started in the window; otherwise, a shell is created.
+If \fB//group\fP is supplied, a container-type window is created in
+which other windows may be created inside it. 
+.PP
+Thus, if your \*Q.screenrc\*U contains the lines
+.sp
+.nf
+	# example for .screenrc:
+	screen 1
+	screen \-fn \-t foobar \-L 2 telnet foobar
+.fi
+.sp
+.I screen
+creates a shell window (in window #1) and a window with a TELNET connection
+to the machine foobar (with no flow-control using the title \*Qfoobar\*U
+in window #2) and will write a logfile (\*Qscreenlog.2\*U) of the telnet 
+session.
+Note, that unlike previous versions of
+.I screen
+no additional default window is created when \*Qscreen\*U commands are 
+included in your \*Q.screenrc\*U file. When the initialization is completed,
+.I screen
+switches to the last window specified in your .screenrc file or, if none,
+opens a default window #0.
+.PP
+Screen has built in some functionality of \*Qcu\*U and \*Qtelnet\*U.
+See also chapter \*QWINDOW TYPES\*U.
+.RE
+.TP
+.B "scrollback \fP\fInum\fP"
+.RS 0
+.PP
+Set the size of the scrollback buffer for the current windows to \fInum\fP 
+lines. The default scrollback is 100 lines.
+See also the \*Qdefscrollback\*U command and use \*Qinfo\*U to view the
+current setting. To access and use the contents in the scrollback buffer,
+use the \*Qcopy\*U command.
+.RE
+.TP
+.BR "select " [ \fIWindowID ]
+.RS 0
+.PP
+Switch to the window identified by \fIWindowID\fP.
+This can be a prefix of a window title (alphanumeric window name) or a
+window number.
+The parameter is optional and if omitted, you get prompted for an identifier. 
+When a new window is established, the first available number
+is assigned to this window.
+Thus, the first window can be activated by \*Qselect 0\*U.
+The number of windows is limited at compile-time by the MAXWIN
+configuration parameter (which defaults to 40).
+There are two special WindowIDs, \*Q\-\*U selects the
+internal blank window and \*Q.\*U selects the current window. The
+latter is useful if used with screen's \*Q\-X\*U option.
+.RE
+.TP
+.BR "sessionname " [ \fIname ]
+.RS 0
+.PP
+Rename the current session. Note, that for \*Qscreen \-list\*U the
+name shows up with the process-id prepended. If the argument \*Qname\*U
+is omitted, the name of this session is displayed. Caution: The $STY 
+environment variables will still reflect the old name in pre-existing
+shells. This may result in confusion. Use of this command is generally
+discouraged. Use the \*Q\-S\*U command-line option if you want to
+name a new session.
+The default is constructed from the tty and host names.
+.RE
+.TP
+.IR "\fBsetenv\fR " [ var " [" string ]]
+.RS 0
+.PP
+Set the environment variable \fIvar\fP to value \fIstring\fP.
+If only \fIvar\fP is specified, the user will be prompted to enter a value.
+If no parameters are specified, the user will be prompted for both variable
+and value. The environment is inherited by all subsequently forked shells.
+.RE
+.TP
+.BR "setsid [ on | off ]"
+.RS 0
+.PP
+Normally screen uses different sessions and process groups for
+the windows. If setsid is turned \fIoff\fP, this is not done
+anymore and all windows will be in the same process group as the
+screen backend process. This also breaks job-control, so be careful.
+The default is \fIon\fP, of course. This command is probably useful
+only in rare circumstances.
+.RE
+.TP
+.B "shell \fIcommand\fP"
+.RS 0
+.PP
+Set the command to be used to create a new shell.
+This overrides the value of the environment variable $SHELL.
+This is useful if you'd like to run a tty-enhancer which is expecting to
+execute the program specified in $SHELL. 
+If the command begins with a '\-' character, the shell will be started as a
+login-shell. Typical shells do only minimal initialization when not started as a login-shell.
+E.g. Bash will not read your \*Q~/.bashrc\*U unless it is a login-shell.
+.RE
+.TP
+.B "shelltitle \fItitle\fP"
+.RS 0
+.PP
+Set the title for all shells created during startup or by
+the C-A C-c command.
+For details about what a title is, see the discussion
+entitled \*QTITLES (naming windows)\*U.
+.RE
+.TP
+.BR "silence [ on | off | sec ]"
+.RS 0
+.PP
+Toggles silence monitoring of windows.
+When silence is turned on and an affected window is switched into the
+background, you will receive the silence notification message in the
+status line after a specified period of inactivity (silence). The default
+timeout can be changed with the `silencewait' command or by specifying a 
+number of seconds instead of `on' or `off'.
+Silence is initially off for all windows.
+.RE
+.TP
+.BI "silencewait " sec
+.RS 0
+.PP
+Define the time that all windows monitored for silence should wait before
+displaying a message. Default 30 seconds.
+.sp
+.ne
+.B "sleep \fP\fInum\fP"
+.RS 0
+.PP
+This command will pause the execution of a .screenrc file for \fInum\fP seconds.
+Keyboard activity will end the sleep.
+It may be used to give users a chance to read the messages output by \*Qecho\*U.
+.RE
+.TP
+.B "slowpaste \fImsec\fP"
+.RS 0
+.PP
+Define the speed at which text is inserted into the current window by the 
+paste ("C-a ]") command. 
+If the slowpaste value is nonzero text is written character by character.
+.I screen
+will make a pause of \fImsec\fP milliseconds after each single character write 
+to allow the application to process its input. Only use slowpaste if your 
+underlying system exposes flow control problems while pasting large amounts of 
+text. 
+.RE
+.TP
+.B sort
+.RS 0
+.PP
+Sort the windows in alphabetical order of the window tiles.
+.RE
+.TP
+.BI "source " file
+.RS 0
+.PP
+Read and execute commands from file \fIfile\fP. Source commands may
+be nested to a maximum recursion level of ten. If file is not an
+absolute path and screen is already processing a source command, the
+parent directory of the running source command file is used to search
+for the new command file before screen's current directory.
+
+Note that termcap/terminfo/termcapinfo commands only work at
+startup and reattach time, so they must be reached via the
+default screenrc files to have an effect.
+.RE
+.TP
+.IR "\fBsorendition\fR " [ attr [ color ]]
+.RS 0
+.PP
+This command is deprecated. See "rendition so" instead.
+.RE
+.TP
+.BR split [ \-v ]
+.RS 0
+.PP
+Split the current region into two new ones. All regions on the
+display are resized to make room for the new region. The blank
+window is displayed in the new region. The default is to create
+a horizontal split, putting the new regions on the top and
+bottom of each other. Using `-v' will create a vertical split,
+causing the new regions to appear side by side of each other.
+Use the \*Qremove\*U or the \*Qonly\*U command to delete regions.
+Use \*Qfocus\*U to toggle between regions.
+
+When a region is split opposite of how it was previously split
+(that is, vertical then horizontal or horizontal then vertical),
+a new layer is created. The layer is used to group together the
+regions that are split the same. Normally, as a user, you should
+not see nor have to worry about layers, but they will affect how
+some commands (\*Qfocus\*U and \*Qresize\*U) behave.
+
+With this current implementation of screen, scrolling data
+will appear much slower in a vertically split region than one
+that is not. This should be taken into consideration if you need
+to use system commands such as \fBcat\fP or \fBtail -f\fP.
+.RE
+.TP
+.B "startup_message [ on | off ]"
+.RS 0
+.PP
+Select whether you want to see the copyright notice during startup.
+Default is `on', as you probably noticed.
+.RE
+.PP
+.BR "status [ top | up | down | bottom ] [ left | right ]"
+.RS 0
+.PP
+The status window by default is in bottom-left corner. This command can move
+status messages to any corner of the screen. \fBtop\fR is the same as \fBup\fR,
+\fBdown\fR is the same as \fBbottom\fR.
+.RE
+.TP
+.BR "stuff " [ "\fIstring\fR" ]
+.RS 0
+.PP
+Stuff the string
+.I string
+in the input buffer of the current window.
+This is like the \*Qpaste\*U command but with much less overhead.
+Without a parameter, screen will prompt for a string to stuff.
+You cannot paste
+large buffers with the \*Qstuff\*U command. It is most useful for key
+bindings. See also \*Qbindkey\*U.
+.RE
+.TP
+.IR "\fBsu \fR" [ username " [" password " [" password2 ]]]
+.RS 0
+.PP
+Substitute the user of a display. The command prompts for all parameters that
+are omitted. If passwords are specified as parameters, they have to be
+specified un-crypted. The first password is matched against the systems
+passwd database, the second password is matched against the 
+.I screen
+password as set with the commands \*Qacladd\*U or \*Qpassword\*U.
+\*QSu\*U may be useful for the 
+.I screen
+administrator to test multiuser setups.
+.\"						XXX removed in 3.8.0 XXX
+.\" but it is mainly used implicitly
+.\" by the \*Qconnect\*U command to identify users that access a remote session.
+When the identification fails, the user has access to the commands available
+for user
+.BR nobody .
+These are \*Qdetach\*U, \*Qlicense\*U, \*Qversion\*U, \*Qhelp\*U and
+\*Qdisplays\*U.
+.RE
+.TP
+.B "suspend"
+.RS 0
+.PP
+Suspend
+.IR screen .
+The windows are in the `detached' state, while 
+.I screen
+is suspended. This feature relies on the shell being able to do job control.
+.RE
+.TP
+.B "term \fIterm\fP"
+.RS 0
+.PP
+In each window's environment
+.I screen
+opens, the $TERM variable is set to \*Qscreen\*U by default. 
+But when no description for \*Qscreen\*U is installed in the local termcap
+or terminfo data base, you set $TERM to \- say \-
+\*Qvt100\*U. This won't do much harm, as 
+.I screen
+is VT100/ANSI compatible.
+The use of the \*Qterm\*U command is discouraged for non-default purpose.
+That is, one may want to specify special $TERM settings (e.g. vt100) for the
+next \*Qscreen rlogin othermachine\*U command. Use the command \*Qscreen \-T vt100
+rlogin othermachine\*U rather than setting and resetting the default.
+.RE
+.TP
+.BI termcap " term terminal\-tweaks" \fR[\fP \fIwindow-tweaks\fR \fI]\fR
+.TP
+.BI terminfo " term terminal\-tweaks" \fR[\fP \fIwindow-tweaks\fR \fI]\fR
+.TP
+.BI termcapinfo " term terminal\-tweaks" \fR[\fP \fIwindow-tweaks\fR \fI]\fR
+.RS 0
+.PP
+Use this command to modify your terminal's termcap entry without going
+through all the hassles involved in creating a custom termcap entry.
+Plus, you can optionally customize the termcap generated for the windows.
+You have to place these commands in one of the screenrc startup files, as
+they are meaningless once the terminal emulator is booted.  
+.PP
+If your system uses the terminfo database rather than termcap,
+.I screen 
+will understand the `terminfo' command, which has the same effects as the
+`termcap' command.  Two separate commands are provided, as there are subtle
+syntactic differences, e.g. when parameter interpolation (using `%') is
+required. Note that termcap names of the capabilities have to be used
+with the `terminfo' command. 
+.PP
+In many cases, where the arguments are valid in both terminfo and termcap
+syntax, you can use the command `termcapinfo', which is just a shorthand
+for a pair of `termcap' and `terminfo' commands with identical arguments.
+.PP
+The first argument specifies which terminal(s) should be affected by this
+definition.
+You can specify multiple terminal names by separating them with `|'s.
+Use `*' to match all terminals and `vt*' to match all terminals that begin
+with \*Qvt\*U.
+.PP
+Each \fItweak\fP argument contains one or more termcap defines (separated
+by `:'s) to be inserted at the start of the appropriate termcap entry,
+enhancing it or overriding existing values.
+The first tweak modifies your terminal's termcap, and contains definitions
+that your terminal uses to perform certain functions.
+Specify a null string to leave this unchanged (e.\|g. '').
+The second (optional) tweak modifies all the window termcaps, and should
+contain definitions that
+.I screen
+understands (see the \*QVIRTUAL TERMINAL\*U
+section).
+.PP
+Some examples:
+.IP
+termcap xterm*  LP:hs@
+.PP
+Informs
+.I screen
+that all terminals that begin with `xterm' have firm auto-margins that
+allow the last position on the screen to be updated (LP), but they don't
+really have a status line (no 'hs' \- append `@' to turn entries off).
+Note that we assume `LP' for all terminal names that start with \*Qvt\*U,
+but only if you don't specify a termcap command for that terminal.
+.RS
+.nf
+termcap vt*  LP
+.fi
+.RE
+.sp 1
+termcap vt102|vt220  Z0=\eE[?3h:Z1=\eE[?3l
+.PP
+Specifies the firm-margined `LP' capability for all terminals that begin with
+`vt', and the second line will also add the escape-sequences to switch
+into (Z0) and back out of (Z1) 132-character-per-line mode if this is
+a VT102 or VT220.
+(You must specify Z0 and Z1 in your termcap to use the width-changing
+commands.)
+.IP
+termcap vt100  ""  l0=PF1:l1=PF2:l2=PF3:l3=PF4
+.PP
+This leaves your vt100 termcap alone and adds the function key labels to
+each window's termcap entry.
+.IP
+termcap h19|z19  am@:im=\eE@:ei=\eEO  dc=\eE[P
+.PP
+Takes a h19 or z19 termcap and turns off auto-margins (am@) and enables the
+insert mode (im) and end-insert (ei) capabilities (the `@' in the `im'
+string is after the `=', so it is part of the string).
+Having the `im' and `ei' definitions put into your terminal's termcap will
+cause
+.I screen
+to automatically advertise the character-insert capability in
+each window's termcap.
+Each window will also get the delete-character capability (dc) added to its
+termcap, which
+.I screen
+will translate into a line-update for the terminal
+(we're pretending it doesn't support character deletion).
+.PP
+If you would like to fully specify each window's termcap entry, you should
+instead set the $SCREENCAP variable prior to running
+.IR screen .
+See the discussion on the \*QVIRTUAL TERMINAL\*U in this manual, and the termcap(5)
+man page for more information on termcap definitions.
+.RE
+.TP
+.B time
+.RI [ string ]
+.RS 0
+.PP
+Uses the message line to display the time of day, the host name, and the load
+averages over 1, 5, and 15 minutes (if this is available on your system).
+For window specific information, use \*Qinfo\*U.
+
+If a string is specified, it changes the format of the time report like it is
+described in the \*QSTRING ESCAPES\*U chapter. Screen uses a default of
+"%c:%s %M %d %H%? %l%?".
+.RE
+.TP
+.BR "title " [ \fIwindowtitle ]
+.RS 0
+.PP
+Set the name of the current window to \fIwindowtitle\fP. If no name is 
+specified,
+.I screen
+prompts for one. This command was known as `aka' in previous
+releases.
+.RE
+.TP
+.BI "unbindall "
+.RS 0
+.PP
+Unbind all the bindings. This can be useful when
+screen is used solely for its detaching abilities, such as when
+letting a console application run as a daemon. If, for some reason,
+it is necessary to bind commands after this, use 'screen \-X'.
+.RE
+.TP
+.BI "unsetenv " var
+.RS 0
+.PP
+Unset an environment variable.
+.RE
+.TP
+.BR "utf8 [ on | off [ on | off ]]"
+.RS 0
+.PP
+Change the encoding used in the current window. If utf8 is enabled, the
+strings sent to the window will be UTF-8 encoded and vice versa. Omitting the
+parameter toggles the setting. If a second parameter is given, the display's
+encoding is also changed (this should rather be done with screen's \*Q\-U\*U
+option).
+See also \*Qdefutf8\*U, which changes the default setting of a new
+window.
+.RE
+.TP
+.BR "vbell [ on | off ]"
+.RS 0
+.PP
+Sets the visual bell setting for this window. Omitting the parameter
+toggles the setting. If vbell is switched on, but your terminal does not 
+support a visual bell, a `vbell-message' is displayed in the status line when
+the bell character (^G) is received.
+Visual bell support of a terminal is defined by the termcap variable `vb' 
+(terminfo: 'flash'). 
+.PP
+Per default, vbell is off, thus the audible bell is used. 
+See also `bell_msg'.
+.RE
+.TP
+.IR "\fBvbell_msg\fR " [ message ]
+.RS 0
+.PP
+Sets the visual bell message. \fImessage\fP is printed to the status line if
+the window receives a bell character (^G), vbell is set to \*Qon\*U, but the 
+terminal does not support a visual bell.
+The default message is \*QWuff, Wuff!!\*U.
+Without a parameter, the current message is shown.
+.RE
+.TP
+.BI "vbellwait " sec
+.RS 0
+.PP
+Define a delay in seconds after each display of 
+.IR screen 's
+visual bell message. The default is 1 second.
+.RE
+.TP
+.BR "verbose [ on | off ]"
+.RS 0
+.PP
+If verbose is switched on, the command name is echoed, whenever a window
+is created (or resurrected from zombie state). Default is off.
+Without a parameter, the current setting is shown.
+.RE
+.TP
+.B version
+.RS 0
+.PP
+Print the current version and the compile date in the status line.
+.RE
+.TP
+.BI "wall " "message"
+.RS 0
+.PP
+Write a message to all displays. The message will appear in the terminal's
+status line.
+.RE
+.TP
+.BR "width " [ \-w | \-d "] [" "\fIcols\fR " [ \fIlines\fR ]]
+.RS 0
+.PP
+Toggle the window width between 80 and 132 columns or set it to \fIcols\fP 
+columns if an argument is specified. 
+This requires a capable terminal and the termcap entries \*QZ0\*U and \*QZ1\*U.
+See the \*Qtermcap\*U command for more information. You can also specify
+a new height if you want to change both values.
+The
+.B \-w
+option tells screen to leave the display size unchanged and just set
+the window size,
+.B \-d
+vice versa.
+.RE
+.TP
+.BR "windowlist [ \-b ] [ \-m ] [ \-g ]"
+.TP
+.IR "\fBwindowlist string\fR " [ string ]
+.TP
+.IR "\fBwindowlist title\fR " [ title ]
+.RS 0
+.PP
+Display all windows in a table for visual window selection.
+If screen was in a window group, screen will
+back out of the group and then display the windows in that group.
+If the 
+.B \-b
+option is given, screen will switch to the blank window before
+presenting the list, so that the current window is also selectable.
+The
+.B \-m
+option changes the order of the windows, instead of sorting by
+window numbers screen uses its internal most-recently-used list.
+The
+.B \-g
+option will show the windows inside any groups in that level
+and downwards.
+.PP
+The following keys are used to navigate in \*Qwindowlist\*U:
+
+.TS
+tab(@);
+l l.
+_
+\fBk\fP, \fBC-p\fP, or \fBup\fP@Move up one line.
+_
+\fBj\fP, \fBC-n\fP, or \fBdown\fP@Move down one line.
+_
+\fBC-g\fP or \fBescape\fP@Exit windowlist.
+_
+\fBC-a\fP or \fBhome\fP@Move to the first line.
+_
+\fBC-e\fP or \fBend\fP@Move to the last line.
+_
+\fBC-u\fP or \fBC-d\fP@Move one half page up or down.
+_
+\fBC-b\fP or \fBC-f\fP@Move one full page up or down.
+_
+\fB0..9\fP@Using the number keys, move to the selected line.
+_
+\fBmouseclick\fP@T{
+Move to the selected line. Available when
+\*Qmousetrack\*U is set to \*Qon\*U
+T}
+_
+\fB/\fP@Search.
+_
+\fBn\fP@Repeat search in the forward direction.
+_
+\fBN\fP@Repeat search in the backward direction.
+_
+\fBm\fP@Toggle MRU.
+_
+\fBg\fP@Toggle group nesting.
+_
+\fBa\fP@All window view.
+_
+\fBC-h\fP or backspace@Back out the group.
+_
+\fB,\fP@Switch numbers with the previous window.
+_
+\fB.\fP@Switch numbers with the next window.
+_
+\fBK\fP@Kill that window.
+_
+\fBspace\fP or \fBenter\fP@Select that window.
+_
+.TE
+.sp 1
+The table format can be changed with the \fBstring\fP and
+\fBtitle\fP option, the title is displayed as table heading, while
+the lines are made by using the string setting. The default
+setting is \*QNum Name%=Flags\*U for the title and \*Q%3n %t%=%f\*U
+for the lines.
+See the \*QSTRING ESCAPES\*U chapter for more codes (e.g. color
+settings).
+
+\*QWindowlist\*U needs a region size of at least 10 characters wide
+and 6 characters high in order to display.
+.RE
+.TP
+.B windows [ string ]
+.RS 0
+.PP
+Uses the message line to display a list of all the windows.
+Each window is listed by number with the name of process that has been
+started in the window (or its title);
+the current window is marked with a `*';
+the previous window is marked with a `\-';
+all the windows that are \*Qlogged in\*U are marked with a `$';
+a background window that has received a bell is marked with a `!';
+a background window that is being monitored and has had activity occur
+is marked with an `@';
+a window which has output logging turned on is marked with `(L)'; 
+windows occupied by other users are marked with `&';
+windows in the zombie state are marked with `Z'.
+If this list is too long to fit on the terminal's status line only the
+portion around the current window is displayed.
+The optional string parameter follows the \*QSTRING ESCAPES\*U format.
+If string parameter is passed, the output size is unlimited.
+The default command without any parameter is limited to a size of 1024 bytes.
+.RE
+.TP
+.BR "wrap [ on | off ]"
+.RS 0
+.PP
+Sets the line-wrap setting for the current window.
+When line-wrap is on, the second consecutive printable character output at
+the last column of a line will wrap to the start of the following line.
+As an added feature, backspace (^H) will also wrap through the left margin
+to the previous line.
+Default is `on'. Without any options, the state of wrap is toggled.
+.RE
+.TP
+.BR "writebuf " [ \-e " \fIencoding\fP" "" "] [" \fIfilename\fR ]
+.RS 0
+.PP
+Writes the contents of the paste buffer to the specified file, or the public accessible screen\-exchange
+file if no filename is given. This is thought of as a primitive means of communication between
+.I screen
+users on the same host. If an encoding is specified the paste buffer
+is recoded on the fly to match the encoding.
+The filename can be set with the \fIbufferfile\fP
+command and defaults to \*Q/tmp/screen\-exchange\*U.
+.RE
+.TP
+.BR "writelock [ on | off | auto]"
+.RS 0
+.PP
+In addition to access control lists, not all users may be able to write to
+the same window at once. Per default, writelock is in `auto' mode and
+grants exclusive input permission to the user who is the first to switch
+to the particular window. When he leaves the window, other users may obtain
+the writelock (automatically). The writelock of the current window is disabled
+by the command \*Qwritelock off\*U. If the user issues the command 
+\*Qwritelock on\*U he keeps the exclusive write permission while switching
+to other windows.
+.RE
+.TP
+.B xoff
+.TP
+.B xon
+.RS 0
+.PP
+Insert a CTRL-s / CTRL-q character to the stdin queue of the
+current window.
+.RE
+.TP
+.BR "zmodem [ off | auto | catch | pass ]"
+.TP
+.IR "\fBzmodem sendcmd\fR " [ string ]
+.TP
+.IR "\fBzmodem recvcmd\fR " [ string ]
+.RS 0
+.PP
+Define zmodem support for screen. Screen understands two different
+modes when it detects a zmodem request: \*Qpass\*U and \*Qcatch\*U.
+If the mode is set to \*Qpass\*U, screen will relay all data
+to the attacher until the end of the transmission is reached.
+In \*Qcatch\*U mode screen acts as a zmodem endpoint and starts
+the corresponding rz/sz commands. If the mode is set to \*Qauto\*U,
+screen will use \*Qcatch\*U if the window is a tty (e.g. a serial line),
+otherwise it will use \*Qpass\*U.
+.PP
+You can define the templates screen uses in \*Qcatch\*U mode
+via the second and the third form.
+.PP
+Note also that this is an experimental feature.
+.RE
+.TP
+.BR "zombie " [\fIkeys\fP [ onerror ] ]
+.RS 0
+.PP
+Per default
+.I screen 
+windows are removed from the window list as soon as
+the windows process (e.g. shell) exits. When a string of two keys is 
+specified to the zombie command, `dead' windows will remain in the list.
+The \fBkill\fP command may be used to remove such a window. Pressing the 
+first key in the dead window has the same effect. When pressing the second 
+key, 
+.I screen 
+will attempt to resurrect the window. The process that was 
+initially running in the window will be launched again. Calling \fBzombie\fP
+without parameters will clear the zombie setting, thus making windows disappear 
+when their process exits.
+
+As the zombie-setting is manipulated globally for all windows, this command 
+should probably be called \fBdefzombie\fP, but it isn't.
+
+Optionally you can put the word \*Qonerror\*U after the keys. This will cause screen
+to monitor exit status of the process running in the window. If it exits normally ('0'), 
+the window disappears. Any other exit value causes the window to become a zombie.
+.RE
+.TP
+.BR "zombie_timeout" [\fIseconds\fP]
+.RS 0
+.PP
+Per default
+.I screen
+windows are removed from the window list as soon as
+the windows process (e.g. shell) exits. If \fBzombie\fP keys are defined
+(compare with above \fBzombie\fP command), it is possible to also set a
+timeout when screen tries to automatically reconnect a dead screen window.
+.RE
+
+.SH "THE MESSAGE LINE"
+.I Screen
+displays informational messages and other diagnostics in a \fImessage line\fP.
+While this line is distributed to appear at the bottom of the screen,
+it can be defined to appear at the top of the screen during compilation.
+If your terminal has a status line defined in its termcap,
+.I screen
+will use this for displaying its messages, otherwise a line of the
+current screen will
+be temporarily overwritten and output will be momentarily interrupted. The
+message line is automatically removed after a few seconds delay, but it
+can also be removed early (on terminals without a status line) by beginning
+to type.
+.PP
+The message line facility can be used by an application running in
+the current window by means of the ANSI \fIPrivacy message\fP
+control sequence.
+For instance, from within the shell, try something like:
+.IP
+echo '<esc>^Hello world from window '$WINDOW'<esc>\e\e'
+.PP
+where '<esc>' is an \fIescape\fP, '^' is a literal up-arrow,
+and '\e\e' turns into a single backslash.
+
+.SH "WINDOW TYPES"
+Screen provides three different window types. New windows are created with 
+.IR screen 's
+.B screen
+command (see also the entry in chapter \*QCUSTOMIZATION\*U). The first
+parameter to the 
+.B screen
+command defines which type of window is created. The different window types are
+all special cases of the normal type. They have been added in order
+to allow 
+.I screen 
+to be used efficiently as a console multiplexer with 100 or more windows.
+
+.IP \(bu 3
+The normal window contains a shell (default, if no parameter is given) or any
+other system command that could be executed from a shell (e.g.  
+.BR slogin ,
+etc...)
+
+.IP \(bu
+If a tty (character special device) name (e.g. \*Q/dev/ttya\*U)
+is specified as the first parameter, then the window is directly connected to
+this device. 
+This window type is similar to \*Qscreen cu \-l /dev/ttya\*U.
+Read and write access is required on the device node, an exclusive open is
+attempted on the node to mark the connection line as busy.
+An optional parameter is allowed consisting of a comma separated list of flags
+in the notation used by stty(1):
+.RS
+.IP <baud_rate>		
+Usually 300, 1200, 9600 or 19200. This affects transmission as well as receive speed.
+.IP "cs8 or cs7"
+Specify the transmission of eight (or seven) bits per byte.
+.IP "ixon or \-ixon"
+Enables (or disables) software flow-control (CTRL-S/CTRL-Q) for sending data.
+.IP "ixoff or \-ixoff"
+Enables (or disables) software flow-control for receiving data.
+.IP "istrip or \-istrip"
+Clear (or keep) the eight bit in each received byte.
+.PP
+You may want to specify as many of these options as applicable. Unspecified
+options cause the terminal driver to make up the parameter values of the
+connection.  These values are system dependent and may be in defaults or values
+saved from a previous connection.
+.PP
+For tty windows, the 
+.B info
+command shows some of the modem control lines
+in the status line. These may include `RTS', `CTS', 'DTR', `DSR', `CD' and more.
+This depends on the available ioctl()'s and system header files as well as the
+on the physical capabilities of the serial board. 
+Signals that are logical low (inactive) have their name preceded by
+an exclamation mark (!), otherwise the signal is logical high (active).
+Signals not supported by the hardware but available to the ioctl() interface
+are usually shown low. 
+.PP
+When the CLOCAL status bit is true, the whole set of modem signals is placed 
+inside curly braces ({ and }).
+When the CRTSCTS or TIOCSOFTCAR bit is set, the signals `CTS' or `CD' 
+are shown in parenthesis, respectively. 
+.PP
+For tty windows, the command
+.B break
+causes the Data transmission line (TxD) to go low for a specified period of
+time. This is expected to be interpreted as break signal on the other side.
+No data is sent and no modem control line is changed when a 
+.B break
+is issued.
+.RE
+
+.IP \(bu
+If the first parameter is \*Q//telnet\*U, the second parameter is expected to
+be a host name, and an optional third parameter may specify a TCP port number
+(default decimal 23).  Screen will connect to a server listening on the remote
+host and use the telnet protocol to communicate with that server.
+.PP
+For telnet windows, the command
+.B info
+shows details about the connection in square brackets ([ and ]) at the end of
+the status line. 
+.RS
+.IP b
+BINARY. The connection is in binary mode.
+.IP e
+ECHO. Local echo is disabled.
+.IP c
+SGA. The connection is in `character mode' (default: `line mode').
+.IP t
+TTYPE. The terminal type has been requested by the remote host.
+Screen sends the name \*Qscreen\*U unless instructed otherwise (see also
+the command `term').
+.IP w
+NAWS. The remote site is notified about window size changes.
+.IP f
+LFLOW. The remote host will send flow control information.
+(Ignored at the moment.)
+.PP
+Additional flags for debugging are x, t and n (XDISPLOC, TSPEED and
+NEWENV).
+.PP
+For telnet windows, the command
+.B break
+sends the telnet code IAC BREAK (decimal 243) to the remote host.
+
+
+This window type is only available if
+.I screen
+was compiled with the ENABLE_TELNET option defined.
+.RE
+
+
+.SH "STRING ESCAPES"
+Screen provides an escape mechanism to insert information like the
+current time into messages or file names. The escape character
+is '%' with one exception: inside of a window's hardstatus '^%' ('^E')
+is used instead.
+
+Here is the full list of supported escapes:
+.IP %
+the escape character itself
+.IP E
+sets %? to true if the escape character has been pressed.
+.IP e
+encoding
+.IP f
+flags of the window, see \*Qwindows\*U for meanings of the various flags
+.IP F
+sets %? to true if the window has the focus
+.IP h
+hardstatus of the window
+.IP H
+hostname of the system
+.IP n
+window number
+.IP P
+sets %? to true if the current region is in copy/paste mode
+.IP S
+session name
+.IP s
+window size
+.IP t
+window title
+.IP u
+all other users on this window
+.IP w
+all window numbers and names. With '\-' qualifier: up to the current
+window; with '+' qualifier: starting with the window after the current
+one.
+.IP W
+all window numbers and names except the current one
+.IP x
+the executed command including arguments running in this windows
+.IP X
+the executed command without arguments running in this windows
+.IP ?
+the part to the next '%?' is displayed only if a '%' escape
+inside the part expands to a non-empty string
+.IP :
+else part of '%?'
+.IP =
+pad the string to the display's width (like TeX's hfill). If a
+number is specified, pad to the percentage of the window's width.
+A '0' qualifier tells screen to treat the number as absolute position.
+You can specify to pad relative to the last absolute pad position
+by adding a '+' qualifier or to pad relative to the right margin
+by using '\-'. The padding truncates the string if the specified
+position lies before the current position. Add the 'L' qualifier
+to change this.
+.IP <
+same as '%=' but just do truncation, do not fill with spaces
+.IP >
+mark the current text position for the next truncation. When
+screen needs to do truncation, it tries to do it in a way that
+the marked position gets moved to the specified percentage of
+the output area. (The area starts from the last absolute pad
+position and ends with the position specified by the truncation
+operator.) The 'L' qualifier tells screen to mark the truncated
+parts with '...'.
+.IP {
+attribute/color modifier string terminated by the next \*Q}\*U
+.IP `
+Substitute with the output of a 'backtick' command. The length
+qualifier is misused to identify one of the commands.
+.P
+The 'c' and 'C' escape may be qualified with a '0' to make 
+.I screen 
+use zero instead of space as fill character. The '0' qualifier
+also makes the '=' escape use absolute positions. The 'n' and '='
+escapes understand
+a length qualifier (e.g. '%3n'), 'D' and 'M' can be prefixed with 'L'
+to generate long names, 'w' and 'W' also show the window flags
+if 'L' is given.
+.PP
+An attribute/color modifier is used to change the attributes or the
+color settings. Its format
+is \*Q[attribute modifier] [color description]\*U. The attribute modifier
+must be prefixed by a change type indicator if it can be confused with
+a color description. The following change types are known:
+.IP +
+add the specified set to the current attributes
+.IP \-
+remove the set from the current attributes
+.IP !
+invert the set in the current attributes
+.IP =
+change the current attributes to the specified set
+.PP
+The attribute set can either be specified as a hexadecimal number or
+a combination of the following letters:
+.IP d
+dim
+.PD 0
+.IP u
+underline
+.IP b
+bold
+.IP r
+reverse
+.IP s
+/standout
+.IP B
+blinking
+.PD
+.PP
+Colors are coded either as a hexadecimal number or two letters specifying
+the desired background and foreground color (in that order). The following
+colors are known:
+.IP k
+black
+.PD 0
+.IP r
+red
+.IP g
+green
+.IP y
+yellow
+.IP b
+blue
+.IP m
+magenta
+.IP c
+cyan
+.IP w
+white
+.IP d
+default color
+.IP .
+leave color unchanged
+.PD
+.PP
+The capitalized versions of the letter specify bright colors. You can also
+use the pseudo-color 'i' to set just the brightness and leave the color
+unchanged.
+.br
+A one digit/letter color description is treated as foreground or
+background color dependent on the current attributes: if reverse mode is
+set, the background color is changed instead of the foreground color.
+If you don't like this, prefix the color with a \*Q.\*U. If you want
+the same behavior for two-letter color descriptions, also prefix them
+with a \*Q.\*U.
+.br
+As a special case, \*Q%{\-}\*U restores the attributes and colors that
+were set before the last change was made (i.e., pops one level of the
+color-change stack).
+.PP
+Examples:
+.IP "\*QG\*U"
+set color to bright green
+.IP "\*Q+b r\*U"
+use bold red
+.IP "\*Q= yd\*U"
+clear all attributes, write in default color on yellow background.
+.IP "%\-Lw%{= BW}%50>%n%f* %t%{\-}%+Lw%<"
+The available windows centered at the current window and truncated to
+the available width. The current window is displayed white on blue.
+This can be used with \*Qhardstatus alwayslastline\*U.
+.IP "%?%F%{.R.}%?%3n %t%? [%h]%?"
+The window number and title and the window's hardstatus, if one is set.
+Also use a red background if this is the active focus. Useful for
+\*Qcaption string\*U.
+.SH "FLOW-CONTROL"
+Each window has a flow-control setting that determines how
+.I screen
+deals with
+the XON and XOFF characters (and perhaps the interrupt character).
+When flow-control is turned off,
+.I screen
+ignores the XON and XOFF characters,
+which allows the user to send them to the current program by simply typing
+them (useful for the \fIemacs\fP editor, for instance).
+The trade-off is that it will take longer for output from a \*Qnormal\*U
+program to pause in response to an XOFF.
+With flow-control turned on, XON and XOFF characters are used to immediately
+pause the output of the current window.
+You can still send these characters to the current program, but you must use
+the appropriate two-character
+.I screen
+commands (typically \*QC-a q\*U (xon)
+and \*QC-a s\*U (xoff)).
+The xon/xoff commands are also useful for typing C-s and C-q past a terminal
+that intercepts these characters.
+.PP
+Each window has an initial flow-control value set with either the
+.B \-f
+option or the \*Qdefflow\*U .screenrc command. Per default the windows
+are set to automatic flow-switching.
+It can then be toggled between the three states 'fixed on', 'fixed off'
+and 'automatic' interactively with the \*Qflow\*U command bound to "C-a f".
+.PP
+The automatic flow-switching mode deals with
+flow control using the TIOCPKT mode (like \*Qrlogin\*U does). If
+the tty driver does not support TIOCPKT,
+.I screen
+tries to find out
+the right mode based on the current setting of the application
+keypad \- when it is enabled, flow-control is turned off and visa versa.
+Of course, you can still manipulate flow-control manually when needed.
+.PP
+If you're running with flow-control enabled and find that pressing the
+interrupt key (usually C-c) does not interrupt the display until another
+6-8 lines have scrolled by, try running
+.I screen
+with the \*Qinterrupt\*U
+option (add the \*Qinterrupt\*U flag to the \*Qflow\*U command in
+your .screenrc, or use the
+.B \-i
+command-line option).
+This causes the output that
+.I screen
+has accumulated from the interrupted program to be flushed.
+One disadvantage is that the virtual terminal's memory contains the
+non-flushed version of the output, which in rare cases can cause
+minor inaccuracies in the output.
+For example, if you switch screens and return, or update the screen
+with \*QC-a l\*U you would see the version of the output you would
+have gotten without \*Qinterrupt\*U being on.
+Also, you might need to turn off flow-control (or use auto-flow mode to turn
+it off automatically) when running a program that expects you to type the
+interrupt character as input, as it is possible to interrupt
+the output of the virtual terminal to your physical terminal when flow-control
+is enabled.
+If this happens, a simple refresh of the screen with \*QC-a l\*U will
+restore it.
+Give each mode a try, and use whichever mode you find more comfortable.
+
+
+.SH "TITLES (naming windows)"
+You can customize each window's name in the window display (viewed with the
+\*Qwindows\*U command (C-a w)) by setting it with one of
+the title commands.
+Normally the name displayed is the actual command name of the program
+created in the window.
+However, it is sometimes useful to distinguish various programs of the same
+name or to change the name on-the-fly to reflect the current state of
+the window.
+.PP
+The default name for all shell windows can be set with the \*Qshelltitle\*U
+command in the .screenrc file, while all other windows are created with
+a \*Qscreen\*U command and thus can have their name set with the
+.B \-t
+option.
+Interactively, there is the title-string escape-sequence
+(<esc>k\fIname\fP<esc>\e) and the \*Qtitle\*U command (C-a A).
+The former can be output from an application to control the window's name
+under software control, and the latter will prompt for a name when typed.
+You can also bind pre-defined names to keys with the \*Qtitle\*U command
+to set things quickly without prompting. Changing title by this escape sequence
+can be controlled by \fBdefdynamictitle\fP and \fBdynamictitle\fP commands. 
+.PP
+Finally,
+.I screen
+has a shell-specific heuristic that is enabled by setting the window's name
+to \*Q\fIsearch|name\fP\*U and arranging to have a null title escape-sequence
+output as a part of your prompt.
+The \fIsearch\fP portion specifies an end-of-prompt search string, while
+the \fIname\fP portion specifies the default shell name for the window.
+If the \fIname\fP ends in a `:'
+.I screen
+will add what it believes to be the current command running in the window
+to the end of the window's shell name (e.\|g. \*Q\fIname:cmd\fP\*U).
+Otherwise the current command name supersedes the shell name while it is
+running.
+.PP
+Here's how it works:  you must modify your shell prompt to output a null
+title-escape-sequence (<esc>k<esc>\e) as a part of your prompt.
+The last part of your prompt must be the same as the string you specified
+for the \fIsearch\fP portion of the title.
+Once this is set up,
+.I screen
+will use the title-escape-sequence to clear the previous command name and
+get ready for the next command.
+Then, when a newline is received from the shell, a search is made for the
+end of the prompt.
+If found, it will grab the first word after the matched string and use it
+as the command name.
+If the command name begins with either '!', '%', or '^'
+.I screen
+will use the first word on the following line (if found) in preference to
+the just-found name.
+This helps csh users get better command names when using job control or
+history recall commands.
+.PP
+Here's some .screenrc examples:
+.sp
+.nf
+	screen \-t top 2 nice top
+.fi
+.sp
+Adding this line to your .screenrc would start a nice-d version of the
+\*Qtop\*U command in window 2 named \*Qtop\*U rather than \*Qnice\*U.
+.sp
+.nf
+	shelltitle '> |csh'
+	screen 1
+.fi
+.sp
+These commands would start a shell with the given shelltitle.
+The title specified is an auto-title that would expect the prompt and
+the typed command to look something like the following:
+.sp
+.nf
+	/usr/joe/src/dir> trn
+.fi
+.sp
+(it looks after the '> ' for the command name).
+The window status would show the name \*Qtrn\*U while the command was
+running, and revert to \*Qcsh\*U upon completion.
+.sp
+.nf
+	bind R screen \-t '% |root:' su
+.fi
+.sp
+Having this command in your .screenrc would bind the key
+sequence \*QC-a R\*U to the \*Qsu\*U command and give it an
+auto-title name of \*Qroot:\*U.
+For this auto-title to work, the screen could look something
+like this:
+.sp
+.nf
+	% !em
+	emacs file.c
+.fi
+.sp
+Here the user typed the csh history command \*Q!em\*U which ran the
+previously entered \*Qemacs\*U command.
+The window status would show \*Qroot:emacs\*U during the execution
+of the command, and revert to simply \*Qroot:\*U at its completion.
+.PP
+.nf
+	bind o title
+	bind E title ""
+	bind u title (unknown)
+.fi
+.sp
+The first binding doesn't have any arguments, so it would prompt you
+for a title when you type \*QC-a o\*U.
+The second binding would clear an auto-title's current setting (C-a E).
+The third binding would set the current window's title to \*Q(unknown)\*U
+(C-a u).
+.PP
+One thing to keep in mind when adding a null title-escape-sequence to
+your prompt is that some shells (like the csh) count all the non-control
+characters as part of the prompt's length.
+If these invisible characters aren't a multiple of 8 then backspacing over
+a tab will result in an incorrect display.
+One way to get around this is to use a prompt like this:
+.sp
+.nf
+	set prompt='^[[0000m^[k^[\e% '
+.fi
+.sp
+The escape-sequence \*Q<esc>[0000m\*U not only normalizes the character
+attributes, but all the zeros round the length of the invisible characters
+up to 8.
+Bash users will probably want to echo the escape sequence in the
+PROMPT_COMMAND:
+.sp
+.nf
+	PROMPT_COMMAND='printf "\e033k\e033\e134"'
+.fi
+.sp
+(I used \*Q\e134\*U to output a `\e' because of a bug in bash v1.04).
+
+
+.SH "THE VIRTUAL TERMINAL"
+Each window in a 
+.I screen
+session emulates a VT100 terminal, with some extra functions added. The
+VT100 emulator is hard-coded, no other terminal types can be emulated.
+.br
+Usually
+.I screen
+tries to emulate as much of the VT100/ANSI standard
+as possible. But if your terminal lacks certain capabilities,
+the emulation may not be complete. In these cases
+.I screen
+has to tell the applications that some of the features
+are missing. This is no problem on machines using termcap,
+because
+.I screen
+can use the $TERMCAP variable to
+customize the standard
+.I screen
+termcap.
+.PP
+But if you do a
+rlogin on another machine or your machine supports only
+terminfo this method fails. Because of this,
+.I screen
+offers a way to deal with these cases. 
+Here is how it works:
+.PP
+When 
+.I screen
+tries to figure out a terminal name for itself,
+it first looks
+for an entry named \*Qscreen.<term>\*U, where <term> is
+the contents of your $TERM variable.
+If no such entry exists,
+.I screen
+tries \*Qscreen\*U (or \*Qscreen\-w\*U if the terminal is wide
+(132 cols or more)).
+If even this entry cannot be found, \*Qvt100\*U is used as a
+substitute.
+.PP
+The idea is that if you have a terminal which doesn't
+support an important feature (e.g. delete char or clear to EOS)
+you can build a new termcap/terminfo entry for
+.I screen
+(named \*Qscreen.<dumbterm>\*U) in which this capability
+has been disabled. If this entry is installed on your
+machines you are able to do
+a rlogin and still keep the correct termcap/terminfo entry.
+The terminal name is put in the $TERM variable
+of all new windows.
+.I Screen
+also sets the $TERMCAP variable reflecting the capabilities
+of the virtual terminal emulated. Notice that, however, on machines
+using the terminfo database this variable has no effect.
+Furthermore, the variable $WINDOW is set to the window number
+of each window.
+.PP
+The actual set of capabilities supported by the virtual terminal
+depends on the capabilities supported by the physical terminal.
+If, for instance, the physical terminal does not support underscore mode,
+.I screen
+does not put the `us' and `ue' capabilities into the window's $TERMCAP
+variable, accordingly.
+However, a minimum number of capabilities must be supported by a
+terminal in order to run
+.IR screen ;
+namely scrolling, clear screen, and direct cursor addressing
+(in addition,
+.I screen
+does not run on hardcopy terminals or on terminals that over-strike).
+.PP
+Also, you can customize the $TERMCAP value used by
+.I screen
+by using the \*Qtermcap\*U .screenrc command, or
+by defining the variable $SCREENCAP prior to startup.
+When the latter is defined, its value will be copied verbatim into each
+window's $TERMCAP variable.
+This can either be the full terminal definition, or a filename where the
+terminal \*Qscreen\*U (and/or \*Qscreen\-w\*U) is defined.
+.PP
+Note that 
+.I screen
+honors the \*Qterminfo\*U .screenrc command if the system uses the
+terminfo database rather than termcap.
+.PP
+When the boolean `G0' capability is present in the termcap entry
+for the terminal on which
+.I screen
+has been called, the terminal emulation of
+.I screen
+supports multiple character sets.
+This allows an application to make use of, for instance,
+the VT100 graphics character set or national character sets.
+The following control functions from ISO 2022 are supported:
+\fIlock shift G0\fP (\fISI\fP), \fIlock shift G1\fP (\fISO\fP),
+\fIlock shift G2\fP, \fIlock shift G3\fP, \fIsingle shift G2\fP,
+and \fIsingle shift G3\fP.
+When a virtual terminal is created or reset, the ASCII character
+set is designated as \fIG0\fP through \fIG3\fP.
+When the `G0' capability is present,
+.I screen
+evaluates the capabilities
+`S0', `E0', and `C0' if present. `S0' is the sequence the terminal uses
+to enable and start the graphics character set rather than \fISI\fP. 
+`E0' is the corresponding replacement for \fISO\fP. `C0' gives a character
+by character translation string that is used during semi-graphics mode. This 
+string is built like the `acsc' terminfo capability.
+.PP
+When the `po' and `pf' capabilities are present in the terminal's
+termcap entry, applications running in a
+.I screen
+window can send output to the printer port of the terminal.
+This allows a user to have an application in one window
+sending output to a printer connected to the terminal, while all
+other windows are still active (the printer port is enabled
+and disabled again for each chunk of output).
+As a side-effect, programs running in different windows can
+send output to the printer simultaneously.
+Data sent to the printer is not displayed in the window.  The 
+.I info
+command displays a line starting `PRIN' while the printer is active.
+.PP
+.I Screen
+maintains a hardstatus line for every window. If a window
+gets selected, the display's hardstatus will be updated to match
+the window's hardstatus line. If the display has no hardstatus
+the line will be displayed as a standard 
+.I screen 
+message.
+The hardstatus line can be changed with the ANSI Application
+Program Command (APC): \*QESC_<string>ESC\e\*U. As a convenience
+for xterm users the sequence \*QESC]0..2;<string>^G\*U is
+also accepted.
+.PP
+Some capabilities are only put into the $TERMCAP
+variable of the virtual terminal if they can be efficiently
+implemented by the physical terminal.
+For instance, `dl' (delete line) is only put into the $TERMCAP
+variable if the terminal supports either delete line itself or
+scrolling regions. Note that this may provoke confusion, when 
+the session is reattached on a different terminal, as the value
+of $TERMCAP cannot be modified by parent processes.
+.PP
+The "alternate screen" capability is not enabled by default.
+Set the \fBaltscreen\fP .screenrc command to enable it.
+.PP
+The following is a list of control sequences recognized by
+.IR screen .
+\*Q(V)\*U and \*Q(A)\*U indicate VT100-specific and ANSI- or
+ISO-specific functions, respectively.
+.PP
+.ta 22n
+.TP 27
+.B "ESC E"
+Next Line
+.TP 27
+.B "ESC D"
+Index
+.TP 27
+.B "ESC M"
+Reverse Index
+.TP 27
+.B "ESC H"
+Horizontal Tab Set
+.TP 27
+.B "ESC Z"
+Send VT100 Identification String
+.TP 27
+.BR "ESC 7" "	(V)"
+Save Cursor and Attributes
+.TP 27
+.BR "ESC 8" "	(V)"
+Restore Cursor and Attributes
+.TP 27
+.BR "ESC [s" "	(A)"
+Save Cursor and Attributes
+.TP 27
+.BR "ESC [u" "	(A)"
+Restore Cursor and Attributes
+.TP 27
+.B "ESC c"
+Reset to Initial State
+.TP 27
+.B "ESC g"
+Visual Bell
+.TP 27
+.B "ESC \fPPn\fB p"
+Cursor Visibility (97801)
+.RS
+.TP 27
+Pn = \fB6\fP
+Invisible
+.TP 27
+Pn = \fB7\fP
+Visible
+.RE
+.TP 27
+.BR "ESC =" "	(V)"
+Application Keypad Mode
+.TP 27
+.BR "ESC >" "	(V)"
+Numeric Keypad Mode
+.TP 27
+.BR "ESC # 8" "	(V)"
+Fill Screen with E's
+.TP 27
+.BR "ESC \e" "	(A)"
+String Terminator
+.TP 27
+.BR "ESC ^" "	(A)"
+Privacy Message String (Message Line)
+.TP 27
+.B "ESC !"
+Global Message String (Message Line)
+.TP 27
+.B "ESC k"
+A.\|k.\|a. Definition String
+.TP 27
+.BR "ESC P" "	(A)"
+Device Control String.
+Outputs a string directly to the host
+terminal without interpretation.
+.TP 27
+.BR "ESC _" "	(A)"
+Application Program Command (Hardstatus)
+.TP 27
+.BR "ESC ] 0 ; string ^G" "	(A)"
+Operating System Command (Hardstatus, xterm title hack)
+.TP 27
+.BR "ESC ] 83 ; cmd ^G" "	(A)"
+Execute screen command. This only works if multi-user support is
+compiled into screen. The pseudo-user \*Q:window:\*U is used to
+check the access control list. Use \*Qaddacl :window: \-rwx #?\*U to
+create a user with no rights and allow only the needed commands.
+.TP 27
+.BR "Control-N" "	(A)"
+Lock Shift G1 (SO)
+.TP 27
+.BR "Control-O" "	(A)"
+Lock Shift G0 (SI)
+.TP 27
+.BR "ESC n" "	(A)"
+Lock Shift G2
+.TP 27
+.BR "ESC o" "	(A)"
+Lock Shift G3
+.TP 27
+.BR "ESC N" "	(A)"
+Single Shift G2
+.TP 27
+.BR "ESC O" "	(A)"
+Single Shift G3
+.TP 27
+.BR "ESC ( \fPPcs" "	(A)"
+Designate character set as G0
+.TP 27
+.BR "ESC ) \fPPcs" "	(A)"
+Designate character set as G1
+.TP 27
+.BR "ESC * \fPPcs" "	(A)"
+Designate character set as G2
+.TP 27
+.BR "ESC + \fPPcs" "	(A)"
+Designate character set as G3
+.TP 27
+.B "ESC [ \fPPn\fB ; \fPPn\fB H"
+Direct Cursor Addressing
+.TP 27
+.B "ESC [ \fPPn\fB ; \fPPn\fB f"
+same as above
+.TP 27
+.B "ESC [ \fPPn\fB J"
+Erase in Display
+.RS
+.TP 27
+Pn = None or \fB0\fP
+From Cursor to End of Screen
+.TP 27
+Pn = \fB1\fP
+From Beginning of Screen to Cursor
+.TP 27
+Pn = \fB2\fP
+Entire Screen
+.RE
+.TP 27
+.B "ESC [ \fPPn\fB K"
+Erase in Line
+.RS
+.TP 27
+Pn = None or \fB0\fP
+From Cursor to End of Line
+.TP 27
+Pn = \fB1\fP
+From Beginning of Line to Cursor
+.TP 27
+Pn = \fB2\fP
+Entire Line
+.RE
+.TP 27
+.B "ESC [ \fPPn\fB X"
+Erase character
+.TP 27
+.B "ESC [ \fPPn\fB A"
+Cursor Up
+.TP 27
+.B "ESC [ \fPPn\fB B"
+Cursor Down
+.TP 27
+.B "ESC [ \fPPn\fB C"
+Cursor Right
+.TP 27
+.B "ESC [ \fPPn\fB D"
+Cursor Left
+.TP 27
+.B "ESC [ \fPPn\fB E"
+Cursor next line
+.TP 27
+.B "ESC [ \fPPn\fB F"
+Cursor previous line
+.TP 27
+.B "ESC [ \fPPn\fB G"
+Cursor horizontal position
+.TP 27
+.B "ESC [ \fPPn\fB `"
+same as above
+.TP 27
+.B "ESC [ \fPPn\fB d"
+Cursor vertical position
+.TP 27
+.B "ESC [ \fPPs\fB ;\fP...\fB; \fPPs\fB m"
+Select Graphic Rendition
+.RS
+.TP 27
+Ps = None or \fB0\fP
+Default Rendition
+.TP 27
+Ps = \fB1\fP
+Bold
+.TP 27
+Ps = \fB2\fP	(A)
+Faint
+.TP 27
+Ps = \fB3\fP	(A)
+\fIStandout\fP Mode (ANSI: Italicized)
+.TP 27
+Ps = \fB4\fP
+Underlined
+.TP 27
+Ps = \fB5\fP
+Blinking
+.TP 27
+Ps = \fB7\fP
+Negative Image
+.TP 27
+Ps = \fB22\fP	(A)
+Normal Intensity
+.TP 27
+Ps = \fB23\fP	(A)
+\fIStandout\fP Mode off (ANSI: Italicized off)
+.TP 27
+Ps = \fB24\fP	(A)
+Not Underlined
+.TP 27
+Ps = \fB25\fP	(A)
+Not Blinking
+.TP 27
+Ps = \fB27\fP	(A)
+Positive Image
+.TP 27
+Ps = \fB30\fP	(A)
+Foreground Black
+.TP 27
+Ps = \fB31\fP	(A)
+Foreground Red
+.TP 27
+Ps = \fB32\fP	(A)
+Foreground Green
+.TP 27
+Ps = \fB33\fP	(A)
+Foreground Yellow
+.TP 27
+Ps = \fB34\fP	(A)
+Foreground Blue
+.TP 27
+Ps = \fB35\fP	(A)
+Foreground Magenta
+.TP 27
+Ps = \fB36\fP	(A)
+Foreground Cyan
+.TP 27
+Ps = \fB37\fP	(A)
+Foreground White
+.TP 27
+Ps = \fB39\fP	(A)
+Foreground Default
+.TP 27
+Ps = \fB40\fP	(A)
+Background Black
+.TP 27
+Ps = \fB...\fP
+...
+.TP 27
+Ps = \fB49\fP	(A)
+Background Default
+.RE
+.TP 27
+.B "ESC [ \fPPn\fB g"
+Tab Clear
+.RS
+.TP 27
+Pn = None or \fB0\fP
+Clear Tab at Current Position
+.TP 27
+Pn = \fB3\fP
+Clear All Tabs
+.RE
+.TP 27
+.BR "ESC [ \fPPn\fB ; \fPPn\fB r" "	(V)"
+Set Scrolling Region
+.TP 27
+.BR "ESC [ \fPPn\fB I" "	(A)"
+Horizontal Tab
+.TP 27
+.BR "ESC [ \fPPn\fB Z" "	(A)"
+Backward Tab
+.TP 27
+.BR "ESC [ \fPPn\fB L" "	(A)"
+Insert Line
+.TP 27
+.BR "ESC [ \fPPn\fB M" "	(A)"
+Delete Line
+.TP 27
+.BR "ESC [ \fPPn\fB @" "	(A)"
+Insert Character
+.TP 27
+.BR "ESC [ \fPPn\fB P" "	(A)"
+Delete Character
+.TP 27
+.B "ESC [ \fPPn\fB S"
+Scroll Scrolling Region Up
+.TP 27
+.B "ESC [ \fPPn\fB T"
+Scroll Scrolling Region Down
+.TP 27
+.B "ESC [ \fPPn\fB ^"
+same as above
+.TP 27
+.B "ESC [ \fPPs\fB ;\fP...\fB; \fPPs\fB h"
+Set Mode
+.TP 27
+.B "ESC [ \fPPs\fB ;\fP...\fB; \fPPs\fB l"
+Reset Mode
+.RS
+.TP 27
+Ps = \fB4\fP	(A)
+Insert Mode
+.TP 27
+Ps = \fB20\fP	(A)
+\fIAutomatic Linefeed\fP Mode
+.TP 27
+Ps = \fB34\fP
+Normal Cursor Visibility
+.TP 27
+Ps = \fB?1\fP	(V)
+Application Cursor Keys
+.TP 27
+Ps = \fB?3\fP	(V)
+Change Terminal Width to 132 columns
+.TP 27
+Ps = \fB?5\fP	(V)
+Reverse Video
+.TP 27
+Ps = \fB?6\fP	(V)
+\fIOrigin\fP Mode
+.TP 27
+Ps = \fB?7\fP	(V)
+\fIWrap\fP Mode
+.TP 27
+Ps = \fB?9\fP
+X10 mouse tracking
+.TP 27
+Ps = \fB?25\fP	(V)
+Visible Cursor
+.TP 27
+Ps = \fB?47\fP
+Alternate Screen (old xterm code)
+.TP 27
+Ps = \fB?1000\fP	(V)
+VT200 mouse tracking
+.TP 27
+Ps = \fB?1047\fP
+Alternate Screen (new xterm code)
+.TP 27
+Ps = \fB?1049\fP
+Alternate Screen (new xterm code)
+.RE
+.TP 27
+.BR "ESC [ 5 i" "	(A)"
+Start relay to printer (ANSI Media Copy)
+.TP 27
+.BR "ESC [ 4 i" "	(A)"
+Stop relay to printer (ANSI Media Copy)
+.TP 27
+.B "ESC [ 8 ; \fPPh\fB ; \fPPw\fB t"
+Resize the window to `Ph' lines and `Pw' columns (SunView special)
+.TP 27
+.B "ESC [ c"
+Send VT100 Identification String
+.TP 27
+.B "ESC [ x"
+Send Terminal Parameter Report
+.TP 27
+.B "ESC [ > c"
+Send VT220 Secondary Device Attributes String
+.TP 27
+.B "ESC [ 6 n"
+Send Cursor Position Report
+
+
+.SH "INPUT TRANSLATION"
+In order to do a full VT100 emulation 
+.I screen
+has to detect
+that a sequence of characters in the input stream was generated
+by a keypress on the user's keyboard and insert the VT100
+style escape sequence. \fIScreen\fP has a very flexible way of doing
+this by making it possible to map arbitrary commands on arbitrary
+sequences of characters. For standard VT100 emulation the command
+will always insert a string in the input buffer of the window
+(see also command \fBstuff\fP in the command table).
+Because the sequences generated by a keypress can
+change after a reattach from a different terminal type, it is
+possible to bind commands to the termcap name of the keys.
+\fIScreen\fP will insert the correct binding after each
+reattach. See the \fBbindkey\fP command for further details on the
+syntax and examples.
+.PP
+Here is the table of the default key bindings. The fourth is what
+command is executed if the keyboard is switched into application
+mode.
+.PP
+.TS
+allbox;
+l l l l.
+Key name	Termcap name	Command	App mode
+Cursor up	ku	\e033[A	\e033OA
+Cursor down	kd	\e033[B	\e033OB
+Cursor right	kr	\e033[C	\e033OC
+Cursor left	kl	\e033[D	\e033OD
+Function key 0	k0	\e033[10~
+Function key 1	k1	\e033OP
+Function key 2	k2	\e033OQ
+Function key 3	k3	\e033OR
+Function key 4	k4	\e033OS
+Function key 5	k5	\e033[15~
+Function key 6	k6	\e033[17~
+Function key 7	k7	\e033[18~
+Function key 8	k8	\e033[19~
+Function key 9	k9	\e033[20~
+Function key 10	k;	\e033[21~
+Function key 11	F1	\e033[23~
+Function key 12	F2	\e033[24~
+Home	kh	\e033[1~
+End	kH	\e033[4~
+Insert	kI	\e033[2~
+Delete	kD	\e033[3~
+Page up	kP	\e033[5~
+Page down	kN	\e033[6~
+Keypad 0	f0	0	\e033Op
+Keypad 1	f1	1	\e033Oq
+Keypad 2	f2	2	\e033Or
+Keypad 3	f3	3	\e033Os
+Keypad 4	f4	4	\e033Ot
+Keypad 5	f5	5	\e033Ou
+Keypad 6	f6	6	\e033Ov
+Keypad 7	f7	7	\e033Ow
+Keypad 8	f8	8	\e033Ox
+Keypad 9	f9	9	\e033Oy
+Keypad +	f+	+	\e033Ok
+Keypad \-	f\-	\-	\e033Om
+Keypad *	f*	*	\e033Oj
+Keypad /	f/	/	\e033Oo
+Keypad =	fq	\&=	\e033OX
+Keypad .	f.	.	\e033On
+Keypad ,	f,	,	\e033Ol
+Keypad enter	fe	\e015	\e033OM
+.TE
+
+.SH SPECIAL TERMINAL CAPABILITIES
+The following table describes all terminal capabilities
+that are recognized by 
+.I screen
+and are not in the termcap(5) manual.
+You can place these capabilities in your termcap entries (in
+`/etc/termcap') or use them with the commands `termcap', `terminfo' and
+`termcapinfo' in your screenrc files. It is often not possible to place
+these capabilities in the terminfo database.
+.PP
+.ta 5n
+.TP 13
+.BI LP "	(bool)"
+Terminal has VT100 style margins (`magic margins'). Note that
+this capability is obsolete because 
+.I screen
+uses the standard 'xn' instead.
+.TP 13
+.BI Z0 "	(str)"
+Change width to 132 columns.
+.TP 13
+.BI Z1 "	(str)"
+Change width to 80 columns.
+.TP 13
+.BI WS "	(str)"
+Resize display. This capability has the desired width and height as
+arguments. \fISunView(tm)\fP example: '\eE[8;%d;%dt'.
+.TP 13
+.BI NF "	(bool)"
+Terminal doesn't need flow control. Send ^S and ^Q direct to
+the application. Same as 'flow off'. The opposite of this
+capability is 'nx'.
+.TP 13
+.BI G0 "	(bool)"
+Terminal can deal with ISO 2022 font selection sequences.
+.TP 13
+.BI S0 "	(str)"
+Switch charset 'G0' to the specified charset. Default
+is '\eE(%.'.
+.TP 13
+.BI E0 "	(str)"
+Switch charset 'G0' back to standard charset. Default
+is '\eE(B'.
+.TP 13
+.BI C0 "	(str)"
+Use the string as a conversion table for font '0'. See
+the 'ac' capability for more details.
+.TP 13
+.BI CS "	(str)"
+Switch cursor-keys to application mode.
+.TP 13
+.BI CE "	(str)"
+Switch cursor-keys back to normal mode.
+.TP 13
+.BI AN "	(bool)"
+Turn on autonuke. See the 'autonuke' command for more details.
+.TP 13
+.BI OL "	(num)"
+Set the output buffer limit. See the 'obuflimit' command for more details.
+.TP 13
+.BI KJ "	(str)"
+Set the encoding of the terminal. See the 'encoding' command for
+valid encodings.
+.TP 13
+.BI AF "	(str)"
+Change character foreground color in an ANSI conform way. This
+capability will almost always be set to '\eE[3%dm' ('\eE[3%p1%dm'
+on terminfo machines).
+.TP 13
+.BI AB "	(str)"
+Same as 'AF', but change background color.
+.TP 13
+.BI AX "	(bool)"
+Does understand ANSI set default fg/bg color (\eE[39m / \eE[49m).
+.TP 13
+.BI XC "	(str)"
+Describe a translation of characters to strings depending on the
+current font. More details follow in the next section.
+.TP 13
+.BI XT "	(bool)"
+Terminal understands special xterm sequences (OSC, mouse tracking).
+.TP 13
+.BI C8 "	(bool)"
+Terminal needs bold to display high-intensity colors (e.g. Eterm).
+.TP 13
+.BI TF "	(bool)"
+Add missing capabilities to the termcap/info entry. (Set by default).
+
+.SH CHARACTER TRANSLATION
+\fIScreen\fP has a powerful mechanism to translate characters to arbitrary
+strings depending on the current font and terminal type.
+Use this feature if you want to work with a common standard character
+set (say ISO8851-latin1) even on terminals that scatter the more
+unusual characters over several national language font pages.
+
+Syntax:
+.nf
+    \fBXC=\fP\fI<charset-mapping>\fP{\fB,,\fP\fI<charset-mapping>\fP}
+    \fI<charset-mapping>\fP := \fI<designator><template>\fP{\fB,\fP\fI<mapping>\fP}
+    \fI<mapping>\fP := \fI<char-to-be-mapped><template-arg>\fP
+.fi
+
+The things in braces may be repeated any number of times.
+
+A \fI<charset-mapping>\fP tells 
+.I screen
+how to map characters
+in font \fI<designator>\fP ('B': Ascii, 'A': UK, 'K': German, etc.)
+to strings. Every \fI<mapping>\fP describes to what string a single
+character will be translated. A template mechanism is used, as 
+most of the time the codes have a lot in common (for example
+strings to switch to and from another charset). Each occurrence
+of '%' in \fI<template>\fP gets substituted with the \fI<template-arg>\fP
+specified together with the character. If your strings are not
+similar at all, then use '%' as a template and place the full
+string in \fI<template-arg>\fP. A quoting mechanism was added to make
+it possible to use a real '%'. The '\e' character quotes the
+special characters '\e', '%', and ','.
+
+Here is an example:
+
+    termcap hp700 'XC=B\eE(K%\eE(B,\e304[,\e326\e\e\e\e,\e334]'
+
+This tells
+.I screen
+how to translate ISOlatin1 (charset 'B')
+upper case umlaut characters on a hp700 terminal that has a
+German charset. '\e304' gets translated to '\eE(K[\eE(B' and so on.
+Note that this line gets parsed *three* times before the internal
+lookup table is built, therefore a lot of quoting is needed to
+create a single '\e'.
+
+Another extension was added to allow more emulation: If a mapping
+translates the unquoted '%' char, it will be sent to the terminal
+whenever 
+.I screen
+switches to the corresponding \fI<designator>\fP. In this
+special case the template is assumed to be just '%' because
+the charset switch sequence and the character mappings normally
+haven't much in common.
+
+This example shows one use of the extension:
+
+    termcap xterm 'XC=K%,%\eE(B,[\e304,\e\e\e\e\e326,]\e334'
+
+Here, a part of the German ('K') charset is emulated on an xterm.
+If 
+.I screen
+has to change to the 'K' charset, '\eE(B' will be sent
+to the terminal, i.e. the ASCII charset is used instead. The
+template is just '%', so the mapping is straightforward: '['
+to '\e304', '\e' to '\e326', and ']' to '\e334'.
+
+.SH ENVIRONMENT
+.PD 0
+.IP COLUMNS 15
+Number of columns on the terminal (overrides termcap entry).
+.IP HOME
+Directory in which to look for .screenrc.
+.IP LINES 
+Number of lines on the terminal (overrides termcap entry).
+.IP LOCKPRG
+Screen lock program.
+.IP NETHACKOPTIONS
+Turns on nethack option.
+.IP PATH
+Used for locating programs to run.
+.IP SCREENCAP
+For customizing a terminal's TERMCAP value.
+.IP SCREENDIR
+Alternate socket directory.
+.IP SCREENRC
+Alternate user screenrc file.
+.IP SHELL
+Default shell program for opening windows (default \*Q/bin/sh\*U).
+See also \*Qshell\*U .screenrc command.
+.IP STY
+Alternate socket name.
+.IP SYSSCREENRC
+Alternate system screenrc file.
+.IP TERM
+Terminal name.
+.IP TERMCAP
+Terminal description.
+.IP WINDOW
+Window number of a window (at creation time).
+
+.SH FILES
+.PD 0
+.IP .../screen-4.?.??/etc/screenrc 34
+.IP .../screen-4.?.??/etc/etcscreenrc
+Examples in the 
+.I screen
+distribution package for private and global initialization files.
+.IP $SYSSCREENRC 
+.IP /usr/local/etc/screenrc
+.I screen
+initialization commands
+.IP $SCREENRC
+.IP $HOME/.screenrc
+Read in after /usr/local/etc/screenrc
+.IP $SCREENDIR/S\-<login>
+.IP /local/screens/S\-<login>
+Socket directories (default)
+.IP /usr/tmp/screens/S\-<login>
+Alternate socket directories.
+.IP "<socket directory>/.termcap"
+Written by the "termcap" output function
+.IP /usr/tmp/screens/screen\-exchange
+or
+.IP /tmp/screen\-exchange
+.I screen
+`interprocess communication buffer'
+.IP hardcopy.[0-9]
+Screen images created by the hardcopy function
+.IP screenlog.[0-9]
+Output log files created by the log function
+.IP /usr/lib/terminfo/?/*
+or
+.IP /etc/termcap
+Terminal capability databases
+.IP /etc/utmp
+Login records
+.IP $LOCKPRG
+Program that locks a terminal.
+
+.SH AUTHORS
+Originally created by Oliver Laumann. For a long time maintained
+and developed by Juergen Weigert, Michael Schroeder, Micah Cowan
+and Sadrul Habib Chowdhury. Since 2015 maintained and developed
+by Amadeusz Slawinski <amade@asmblr.net>
+and Alexander Naumov <alexander_naumov@opensuse.org>.
+
+.SH COPYLEFT
+.nf
+Copyright (c) 2018-2022
+	Alexander Naumov <alexander_naumov@opensuse.org>
+	Amadeusz Slawinski <amade@asmblr.net>
+Copyright (c) 2015-2017
+	Juergen Weigert <jnweiger@immd4.informatik.uni\-erlangen.de>
+	Alexander Naumov <alexander_naumov@opensuse.org>
+	Amadeusz Slawinski <amade@asmblr.net>
+Copyright (c) 2010-2015
+	Juergen Weigert <jnweiger@immd4.informatik.uni\-erlangen.de>
+	Sadrul Habib Chowdhury <sadrul@users.sourceforge.net>
+Copyright (c) 2008, 2009
+	Juergen Weigert <jnweiger@immd4.informatik.uni\-erlangen.de>
+	Michael Schroeder <mlschroe@immd4.informatik.uni\-erlangen.de>
+	Micah Cowan <micah@cowan.name>
+	Sadrul Habib Chowdhury <sadrul@users.sourceforge.net>
+Copyright (C) 1993-2003
+	Juergen Weigert <jnweiger@immd4.informatik.uni\-erlangen.de>
+	Michael Schroeder <mlschroe@immd4.informatik.uni\-erlangen.de>
+Copyright (C) 1987 Oliver Laumann
+.fi
+
+.PP
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 3, or (at your option)
+any later version.
+.PP
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+.PP
+You should have received a copy of the GNU General Public License
+along with this program (see the file COPYING); if not, write to the
+Free Software Foundation, Inc.,
+59 Temple Place - Suite 330, Boston, MA  02111-1307, USA
+
+.SH CONTRIBUTORS
+.nf
+Maarten ter Huurne <maarten@treewalker.org>,
+Jussi Kukkonen <jussi.kukkonen@intel.com>,
+Eric S. Raymond <esr@thyrsus.com>,
+Thomas Renninger <treen@suse.com>,
+Axel Beckert <abe@deuxchevaux.org>,
+Ken Beal <kbeal@amber.ssd.csd.harris.com>,
+Rudolf Koenig <rfkoenig@immd4.informatik.uni\-erlangen.de>,
+Toerless Eckert <eckert@immd4.informatik.uni\-erlangen.de>,
+Wayne Davison <davison@borland.com>,
+Patrick Wolfe <pat@kai.com, kailand!pat>,
+Bart Schaefer <schaefer@cse.ogi.edu>,
+Nathan Glasser <nathan@brokaw.lcs.mit.edu>,
+Larry W. Virden <lvirden@cas.org>,
+Howard Chu <hyc@hanauma.jpl.nasa.gov>,
+Tim MacKenzie <tym@dibbler.cs.monash.edu.au>,
+Markku Jarvinen <mta@{cc,cs,ee}.tut.fi>,
+Marc Boucher <marc@CAM.ORG>,
+Doug Siebert <dsiebert@isca.uiowa.edu>,
+Ken Stillson <stillson@tsfsrv.mitre.org>,
+Ian Frechett <frechett@spot.Colorado.EDU>,
+Brian Koehmstedt <bpk@gnu.ai.mit.edu>,
+Don Smith <djs6015@ultb.isc.rit.edu>,
+Frank van der Linden <vdlinden@fwi.uva.nl>,
+Martin Schweikert <schweik@cpp.ob.open.de>,
+David Vrona <dave@sashimi.lcu.com>,
+E. Tye McQueen <tye%spillman.UUCP@uunet.uu.net>,
+Matthew Green <mrg@eterna.com.au>,
+Christopher Williams <cgw@pobox.com>,
+Matt Mosley <mattm@access.digex.net>,
+Gregory Neil Shapiro <gshapiro@wpi.WPI.EDU>,
+Johannes Zellner <johannes@zellner.org>,
+Pablo Averbuj <pablo@averbuj.com>.
+.fi
+
+.SH AVAILABILITY
+The latest official release of 
+.I screen
+available via anonymous ftp from ftp.gnu.org/gnu/screen/ or any other 
+.I GNU 
+distribution site. The home page of
+.I screen
+is https://savannah.gnu.org/projects/screen/ and the git repo
+is https://git.savannah.gnu.org/cgit/screen.git.
+If you want to help, send a note to
+.BR screen-devel@gnu.org.
+
+.SH BUGS
+.PD
+.IP \(bu 3
+`dm' (delete mode) and `xs' are not handled
+correctly (they are ignored). `xn' is treated as a magic-margin
+indicator.
+.IP \(bu
+.I Screen
+has no clue about double-high or double-wide characters.         
+But this is the only area where 
+.I vttest
+is allowed to fail.
+.IP \(bu
+It is not possible to change the environment variable $TERMCAP when 
+reattaching under a different terminal type.
+.IP \(bu
+The support of terminfo based systems is very limited. Adding extra
+capabilities to $TERMCAP may not have any effects.
+.IP \(bu
+.I Screen
+does not make use of hardware tabs.
+.IP \(bu
+.I Screen
+must be installed as set-uid with owner root on most systems in order
+to be able to correctly change the owner of the tty device file for
+each window.
+Special permission may also be required to write the file \*Q/etc/utmp\*U.
+.IP \(bu
+Entries in \*Q/etc/utmp\*U are not removed when
+.I screen
+is killed with SIGKILL.
+This will cause some programs (like "w" or "rwho")
+to advertise that a user is logged on who really isn't.
+.IP \(bu
+.I Screen
+may give a strange warning when your tty has no utmp entry.
+.IP \(bu
+When the modem line was hung up, 
+.I screen
+may not automatically detach (or quit)
+unless the device driver is configured to send a HANGUP signal. 
+To detach a 
+.I screen
+session use the \-D or \-d command line option.
+.IP \(bu
+If a password is set, the command line options \-d and \-D still detach a
+session without asking.
+.IP \(bu
+Both \*Qbreaktype\*U and \*Qdefbreaktype\*U change the break generating
+method used by all terminal devices. The first should change a window
+specific setting, where the latter should change only the default for new 
+windows.
+.IP \(bu
+When attaching to a multiuser session, the user's .screenrc file is not
+sourced. Each user's personal settings have to be included in the .screenrc
+file from which the session is booted, or have to be changed manually.
+.IP \(bu
+A weird imagination is most useful to gain full advantage of all the features.
+.PP
+Send bug-reports, fixes, enhancements, t-shirts, money, beer & pizza to
+.BR screen-devel@gnu.org .
+
+.SH "SEE ALSO"
+.BR termcap(5),
+.BR utmp(5),
+.BR vi(1),
+.BR captoinfo(1),
+.BR tic(1),
+.BR tty(4),
+.BR pty(7)