diff options
Diffstat (limited to '')
| -rw-r--r-- | doc/groff.html.node/Page-Layout.html | 188 |
1 files changed, 188 insertions, 0 deletions
diff --git a/doc/groff.html.node/Page-Layout.html b/doc/groff.html.node/Page-Layout.html new file mode 100644 index 0000000..8a6a4ad --- /dev/null +++ b/doc/groff.html.node/Page-Layout.html @@ -0,0 +1,188 @@ +<!DOCTYPE html> +<html> +<!-- Created by GNU Texinfo 7.0.3, https://www.gnu.org/software/texinfo/ --> +<head> +<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"> +<!-- This manual documents GNU troff version 1.23.0. + +Copyright © 1994-2023 Free Software Foundation, Inc. + +Permission is granted to copy, distribute and/or modify this document +under the terms of the GNU Free Documentation License, Version 1.3 or +any later version published by the Free Software Foundation; with no +Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A +copy of the license is included in the section entitled "GNU Free +Documentation License". --> +<title>Page Layout (The GNU Troff Manual)</title> + +<meta name="description" content="Page Layout (The GNU Troff Manual)"> +<meta name="keywords" content="Page Layout (The GNU Troff Manual)"> +<meta name="resource-type" content="document"> +<meta name="distribution" content="global"> +<meta name="Generator" content="makeinfo"> +<meta name="viewport" content="width=device-width,initial-scale=1"> + +<link href="index.html" rel="start" title="Top"> +<link href="Request-Index.html" rel="index" title="Request Index"> +<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents"> +<link href="GNU-troff-Reference.html" rel="up" title="GNU troff Reference"> +<link href="Page-Control.html" rel="next" title="Page Control"> +<link href="Line-Continuation.html" rel="prev" title="Line Continuation"> +<style type="text/css"> +<!-- +a.copiable-link {visibility: hidden; text-decoration: none; line-height: 0em} +div.example {margin-left: 3.2em} +span.r {font-family: initial; font-weight: normal; font-style: normal} +span:hover a.copiable-link {visibility: visible} +strong.def-name {font-family: monospace; font-weight: bold; font-size: larger} +--> +</style> + + +</head> + +<body lang="en"> +<div class="section-level-extent" id="Page-Layout"> +<div class="nav-panel"> +<p> +Next: <a href="Page-Control.html" accesskey="n" rel="next">Page Control</a>, Previous: <a href="Line-Continuation.html" accesskey="p" rel="prev">Line Continuation</a>, Up: <a href="GNU-troff-Reference.html" accesskey="u" rel="up">GNU <code class="code">troff</code> Reference</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Request-Index.html" title="Index" rel="index">Index</a>]</p> +</div> +<hr> +<h3 class="section" id="Page-Layout-2">5.17 Page Layout</h3> +<a class="index-entry-id" id="index-page-layout"></a> +<a class="index-entry-id" id="index-layout_002c-page"></a> + +<p>The formatter permits configuration of the page length and page number. +</p> +<dl class="first-deffn"> +<dt class="deffn" id="index-_002epl"><span class="category-def">Request: </span><span><strong class="def-name"><code class="t">.pl</code></strong> <var class="def-var-arguments">[<span class="r"><i class="slanted">length</i></span>]</var><a class="copiable-link" href='#index-_002epl'> ¶</a></span></dt> +<dd><a class="index-entry-id" id="index-pl"></a> +</dd><dt class="deffnx def-cmd-deffn" id="index-_002epl-1"><span class="category-def">Request: </span><span><strong class="def-name"><code class="t">.pl</code></strong> <var class="def-var-arguments"><code class="t">+</code><span class="r"><i class="slanted">length</i></span></var><a class="copiable-link" href='#index-_002epl-1'> ¶</a></span></dt> +<dt class="deffnx def-cmd-deffn" id="index-_002epl-2"><span class="category-def">Request: </span><span><strong class="def-name"><code class="t">.pl</code></strong> <var class="def-var-arguments"><code class="t">-</code><span class="r"><i class="slanted">length</i></span></var><a class="copiable-link" href='#index-_002epl-2'> ¶</a></span></dt> +<dt class="deffnx def-cmd-deffn" id="index-_005cn_005b_002ep_005d"><span class="category-def">Register: </span><span><strong class="def-name"><code class="t">\n[.p]</code></strong><a class="copiable-link" href='#index-_005cn_005b_002ep_005d'> ¶</a></span></dt> +<dd><a class="index-entry-id" id="index-_002ep"></a> +<a class="index-entry-id" id="index-page-length_002c-configuring-_0028pl_0029"></a> +<a class="index-entry-id" id="index-length-of-the-page_002c-configuring-_0028pl_0029"></a> +<a class="index-entry-id" id="index-configuring-the-page-length-_0028pl_0029"></a> +<a class="index-entry-id" id="index-setting-the-page-length-_0028pl_0029"></a> +<p>Change (increase or decrease) the page length per the numeric expression +<var class="var">length</var>. The default scaling unit is ‘<samp class="samp">v</samp>’. A negative +<var class="var">length</var> is valid, but an uncommon application: it prevents page +location traps from being sprung,<a class="footnote" id="DOCF70" href="groff.html_fot.html#FOOT70"><sup>70</sup></a> and each +output line is placed on a new page. If <var class="var">length</var> is invalid, GNU +<code class="code">troff</code> emits a warning in category ‘<samp class="samp">number</samp>’. If <var class="var">length</var> +is absent or invalid, ‘<samp class="samp">11i</samp>’ is assumed. +</p> +<a class="index-entry-id" id="index-page-length-register-_0028_002ep_0029"></a> +<p>The read-only register ‘<samp class="samp">.p</samp>’ interpolates the current page length. +</p></dd></dl> + +<dl class="first-deffn"> +<dt class="deffn" id="index-_002epn"><span class="category-def">Request: </span><span><strong class="def-name"><code class="t">.pn</code></strong> <var class="def-var-arguments">num</var><a class="copiable-link" href='#index-_002epn'> ¶</a></span></dt> +<dd><a class="index-entry-id" id="index-pn"></a> +</dd><dt class="deffnx def-cmd-deffn" id="index-_002epn-1"><span class="category-def">Request: </span><span><strong class="def-name"><code class="t">.pn</code></strong> <var class="def-var-arguments"><code class="t">+</code><span class="r"><i class="slanted">num</i></span></var><a class="copiable-link" href='#index-_002epn-1'> ¶</a></span></dt> +<dt class="deffnx def-cmd-deffn" id="index-_002epn-2"><span class="category-def">Request: </span><span><strong class="def-name"><code class="t">.pn</code></strong> <var class="def-var-arguments"><code class="t">-</code><span class="r"><i class="slanted">num</i></span></var><a class="copiable-link" href='#index-_002epn-2'> ¶</a></span></dt> +<dt class="deffnx def-cmd-deffn" id="index-_005cn_005b_002epn_005d"><span class="category-def">Register: </span><span><strong class="def-name"><code class="t">\n[.pn]</code></strong><a class="copiable-link" href='#index-_005cn_005b_002epn_005d'> ¶</a></span></dt> +<dd><a class="index-entry-id" id="index-_002epn-3"></a> +<a class="index-entry-id" id="index-page-number_002c-configuring-next-_0028pn_0029"></a> +<a class="index-entry-id" id="index-next-page-number_002c-configuring-_0028pn_0029"></a> +<a class="index-entry-id" id="index-number_002c-page_002c-next_002c-configuring-_0028pn_0029"></a> +<p>Change (increase or decrease) the page number of the <em class="emph">next</em> page +per the numeric expression <var class="var">num</var>. If <var class="var">num</var> is invalid, GNU +<code class="code">troff</code> emits a warning in category ‘<samp class="samp">number</samp>’ and ignores the +request. Without an argument, <code class="code">pn</code> is ignored. +</p> +<a class="index-entry-id" id="index-next-page-number-register-_0028_002epn_0029"></a> +<a class="index-entry-id" id="index-page-number_002c-next_002c-register-_0028_002epn_0029"></a> +<p>The read-only register <code class="code">.pn</code> interpolates <var class="var">num</var> if set by +<code class="code">pn</code> on the current page, or the current page number plus 1. +</p></dd></dl> + +<a class="index-entry-id" id="index-headers"></a> +<a class="index-entry-id" id="index-footers"></a> +<a class="index-entry-id" id="index-titles"></a> +<p>The formatter offers special support for typesetting headers and +footers, collectively termed <em class="dfn">titles</em>. Titles have an independent +line length, and their placement on the page is not restricted. +</p> +<dl class="first-deffn"> +<dt class="deffn" id="index-_002etl"><span class="category-def">Request: </span><span><strong class="def-name"><code class="t">.tl</code></strong> <var class="def-var-arguments"><code class="code">'</code><span class="r"><i class="slanted">left</i></span><code class="code">'</code><span class="r"><i class="slanted">center</i></span><code class="code">'</code><span class="r"><i class="slanted">right</i></span><code class="code">'</code></var><a class="copiable-link" href='#index-_002etl'> ¶</a></span></dt> +<dd><a class="index-entry-id" id="index-tl"></a> +<a class="index-entry-id" id="index-title-line_002c-formatting-_0028tl_0029"></a> +<a class="index-entry-id" id="index-formatting-a-title-line-_0028tl_0029"></a> +<a class="index-entry-id" id="index-three_002dpart-title-_0028tl_0029"></a> +<a class="index-entry-id" id="index-page-number-character-_0028_0025_0029"></a> +<p>Format an output line as a title consisting of <var class="var">left</var>, <var class="var">center</var>, +and <var class="var">right</var>, each aligned accordingly. The delimiter need not be a +neutral apostrophe: <code class="code">tl</code> accepts the same delimiters as most escape +sequences; see <a class="ref" href="Delimiters.html">Delimiters</a>. If not used as the delimiter, any +<em class="dfn">page number character</em> character is replaced with the current page +number; the default is ‘<samp class="samp">%</samp>’; see the the <code class="code">pc</code> request below. +Without an argument, <code class="code">tl</code> is ignored. <code class="code">tl</code> writes the title +line immediately, ignoring any partially collected line. +</p> +<p>It is not an error to omit delimiters after the first. For example, +‘<samp class="samp">.tl /Thesis</samp>’<!-- /@w --> is interpreted as ‘<samp class="samp">.tl /Thesis///</samp>’<!-- /@w -->: it +sets a title line comprising only the left-aligned word ‘<samp class="samp">Thesis</samp>’. +</p></dd></dl> + +<dl class="first-deffn"> +<dt class="deffn" id="index-_002elt"><span class="category-def">Request: </span><span><strong class="def-name"><code class="t">.lt</code></strong> <var class="def-var-arguments">[<span class="r"><i class="slanted">length</i></span>]</var><a class="copiable-link" href='#index-_002elt'> ¶</a></span></dt> +<dd><a class="index-entry-id" id="index-lt"></a> +</dd><dt class="deffnx def-cmd-deffn" id="index-_002elt-1"><span class="category-def">Request: </span><span><strong class="def-name"><code class="t">.lt</code></strong> <var class="def-var-arguments"><code class="t">+</code><span class="r"><i class="slanted">length</i></span></var><a class="copiable-link" href='#index-_002elt-1'> ¶</a></span></dt> +<dt class="deffnx def-cmd-deffn" id="index-_002elt-2"><span class="category-def">Request: </span><span><strong class="def-name"><code class="t">.lt</code></strong> <var class="def-var-arguments"><code class="t">-</code><span class="r"><i class="slanted">length</i></span></var><a class="copiable-link" href='#index-_002elt-2'> ¶</a></span></dt> +<dt class="deffnx def-cmd-deffn" id="index-_005cn_005b_002elt_005d"><span class="category-def">Register: </span><span><strong class="def-name"><code class="t">\n[.lt]</code></strong><a class="copiable-link" href='#index-_005cn_005b_002elt_005d'> ¶</a></span></dt> +<dd><a class="index-entry-id" id="index-_002elt-3"></a> +<a class="index-entry-id" id="index-length-of-title-line_002c-configuring-_0028lt_0029"></a> +<a class="index-entry-id" id="index-title-length_002c-configuring-_0028lt_0029"></a> +<p>Change (increase or decrease) the line length used by titles per the +numeric expression <var class="var">length</var>. The default scaling unit is ‘<samp class="samp">m</samp>’. +If <var class="var">length</var> is negative, GNU emits a warning in category +‘<samp class="samp">range</samp>’ and treats <var class="var">length</var> as ‘<samp class="samp">0</samp>’. If <var class="var">length</var> is +invalid, GNU <code class="code">troff</code> emits a warning in category ‘<samp class="samp">number</samp>’ and +ignores the request. The formatter’s default title length is +‘<samp class="samp">6.5i</samp>’. With no argument, the title length is restored to the +previous value. The title length is is associated with the environment +(see <a class="pxref" href="Environments.html">Environments</a>). +</p> +<a class="index-entry-id" id="index-title-line-length-register-_0028_002elt_0029"></a> +<p>The read-only register ‘<samp class="samp">.lt</samp>’ interpolates the title line length. +</p></dd></dl> + +<dl class="first-deffn"> +<dt class="deffn" id="index-_002epc"><span class="category-def">Request: </span><span><strong class="def-name"><code class="t">.pc</code></strong> <var class="def-var-arguments">[<span class="r"><i class="slanted">char</i></span>]</var><a class="copiable-link" href='#index-_002epc'> ¶</a></span></dt> +<dd><a class="index-entry-id" id="index-pc"></a> +<a class="index-entry-id" id="index-changing-the-page-number-character-_0028pc_0029"></a> +<a class="index-entry-id" id="index-page-number-character_002c-changing-_0028pc_0029"></a> +<a class="index-entry-id" id="index-_0025-1"></a> +<p>Set the page number character to <var class="var">char</var>. With no argument, the page +number character is disabled. <code class="code">pc</code> does not affect the +register <code class="code">%</code>. +</p></dd></dl> + +<p>The following example exercises title features. +</p> +<div class="example"> +<div class="group"><pre class="example-preformatted">.lt 50n +This is my partially collected +.tl 'Isomers 2023'%'Dextrose Edition' +line. + ⇒ Isomers 2023 1 Dextrose Edition + ⇒ This is my partially collected line. +</pre></div></div> + +<p>We most often see titles used in page header and footer traps. +See <a class="xref" href="Traps.html">Traps</a>. +</p> + +</div> +<hr> +<div class="nav-panel"> +<p> +Next: <a href="Page-Control.html">Page Control</a>, Previous: <a href="Line-Continuation.html">Line Continuation</a>, Up: <a href="GNU-troff-Reference.html">GNU <code class="code">troff</code> Reference</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Request-Index.html" title="Index" rel="index">Index</a>]</p> +</div> + + + +</body> +</html> |