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+<!-- $LynxId: follow_help.html,v 1.16 2017/04/28 21:42:43 tom Exp $ -->
+<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN">
+
+<html>
+<head>
+ <meta name="generator" content=
+ "HTML Tidy for Linux (vers 25 March 2009), see www.w3.org">
+
+ <title>Help on the Follow link (or page) number feature</title>
+ <link rev="made" href="mailto:lynx-dev@nongnu.org">
+ <meta http-equiv="Content-Type" content=
+ "text/html; charset=us-ascii">
+ <meta name="description" content=
+ " Lynx allows the user to select a link using a single-digit shortcut. There are several configuration choices which apply to this feature.">
+ </head>
+
+<body>
+ <div class="nav">
+ <ul>
+ <li><a href="#overview">Overview</a></li>
+
+ <li><a href="#numbering">Zero and other digits</a></li>
+
+ <li><a href="#suffixes">Suffixes</a></li>
+
+ <li><a href="#form_fields">Specifics for Form Fields</a></li>
+
+ <li><a href="#hidden_links">Hidden Links</a></li>
+
+ <li><a href="#goto_hidden_link">Navigating to Hidden
+ Links</a></li>
+ </ul>
+ </div>
+
+ <h2><a name="overview" id="overview">Overview</a></h2>
+
+ <p>If a user has set one of these modes, (as the default or for
+ the current session via the <em>Options menu</em>) then hypertext
+ links (and form fields, depending on the keypad mode) are
+ prefixed with numbers in square brackets:</p>
+
+ <ul>
+ <li><em>Keypad mode</em> to <em>Links are numbered</em>,
+ or</li>
+
+ <li><em>Form fields are numbered</em>, or</li>
+
+ <li><em>Links and form fields are numbered</em></li>
+ </ul>
+
+ <p>Entering a keyboard or keypad number is treated as an
+ <em>F_LINK_NUM</em> command, and should invoke the <em>Follow
+ link (or goto link or page) number:</em> statusline prompt for a
+ potentially multiple digit number corresponding to an indicated
+ link number.</p>
+
+ <h2><a name="numbering" id="numbering">Zero and other
+ digits</a></h2>
+
+ <p>The prompt can be invoked via typing a zero (<em>0</em>), but
+ it will not be treated as the lead digit for the number entry,
+ whereas digits 1 through 9 both invoke the prompt and are treated
+ as the first digit.</p>
+
+ <p>In <em>Form fields are numbered</em> or <em>Links and form
+ fields are numbered</em> mode, if the number corresponds to a
+ form field you will be positioned on that field, but if it is a
+ submit button it will not be ACTIVATE-ed.</p>
+
+ <p>If the user has set <em>Keypad mode</em> to <em>Numbers act as
+ arrows</em>, then only a zero digit will be treated as an
+ <em>F_LINK_NUM</em> command for invoking the <em>Follow link (or
+ goto link or page) number:</em> prompt.</p>
+
+ <h2><a name="suffixes" id="suffixes">Suffixes</a></h2>
+
+ <p>After accepting a number at the prompt, <strong>Lynx</strong>
+ accepts an optional suffix:</p>
+
+ <dl>
+ <dt><em>RETURN</em> (activate)</dt>
+
+ <dd>Without a suffix, e.g., If <em>RETURN</em> is pressed to
+ terminate the number entry (e.g., <em>123</em>) and it
+ corresponds to a hypertext link, <strong>Lynx</strong> will
+ retrieve the document for that link as if you had paged or used
+ other navigation commands to make it the current link and then
+ ACTIVATE-ed it.</dd>
+
+ <dt><code><strong>g</strong></code> (go)</dt>
+
+ <dd>
+ <p>If the number entered at the prompt has a
+ &ldquo;<em>g</em>&rdquo; suffix (e.g., <em>123g</em>), then
+ <strong>Lynx</strong> will make the link corresponding to
+ that number the current link, paging as appropriate if the
+ link does not appear in the currently displayed page. The
+ &ldquo;<em>g</em>&rdquo; suffix is inferred (need not be
+ entered) for form fields in <em>Form fields are numbered</em>
+ or <em>Links and form fields are numbered</em> mode.</p>
+ </dd>
+
+ <dt><code><strong>p</strong></code> (page)</dt>
+
+ <dd>
+ <p>Alternatively, if the number is given a
+ &ldquo;<em>p</em>&rdquo; suffix (e.g., <em>123p</em>),
+ <strong>Lynx</strong> will make the page corresponding to
+ that number the currently displayed page, and the first link
+ on that page, if any, the current link. The
+ &ldquo;<em>g</em>&rdquo; and &ldquo;<em>p</em>&rdquo;
+ suffixes thus convert the <em>Follow link (or goto link or
+ page) number:</em> feature to an advanced navigation aid.</p>
+ </dd>
+
+ <dt><code><strong>+</strong></code> or
+ <code><strong>-</strong></code> (jump)</dt>
+
+ <dd>
+ <p>Finally, a user may add a <em>+</em> or <em>-</em> suffix
+ to a number command to indicate jumping forward or back
+ relative to the current link or page. For example, typing
+ <em>1g+</em> followed by RETURN will move the current link to
+ the next numbered link, skipping any intervening pages or
+ unnumbered links; <em>1g-</em> goes to the preceding numbered
+ link. On a page without links, <em>3g+</em> goes to the 3rd
+ link <em>following</em> the page. <em>5p+</em> skips ahead 5
+ pages, and so on. You can also enter <em>5+</em> or
+ <em>5-</em>, which will activate the 5th link ahead/behind
+ where you are currently positioned. Note that typing
+ <em>1g+</em> is different from typing a down arrow in that
+ <em>1g+</em> skips pages containing no links, or intervening
+ non-numbered links, such as form fields when form fields are
+ not numbered. It also differs from the <em>&lt;tab&gt;</em>
+ command in that <em>1g+</em> does not skip over whole
+ textareas, unless form fields are not numbered.</p>
+
+ <p><em>NOTE:</em> <em>1+g 1-g 1+p 1-p</em> are all recognized
+ as equivalent to <em>1g+ 1g- 1p+ 1p-</em> . Any other
+ (mistyped) characters end the formula: e.g. <em>1gh+</em> is
+ treated as <em>1g</em>.</p>
+ </dd>
+ </dl>
+
+ <h2><a name="form_fields" id="form_fields">Specifics for Form
+ Fields</a></h2>
+
+ <p>Numbers are associated with form fields only when</p>
+
+ <ul>
+ <li><em>Form fields are numbered</em> or</li>
+
+ <li><em>Links and form fields are numbered</em> mode has been
+ selected.</li>
+ </ul>
+
+ <p>If you have selected <em>Numbers act as arrows</em> or
+ <em>Links are numbered</em> mode, you can seek form fields in the
+ document via WHEREIS searches for strings in their displayed
+ values. If they are INPUT or TEXTAREA fields with no values as
+ yet, you can use two or more underscores as the search string,
+ because underscores are used as placeholders for form fields in
+ the displayed document.</p>
+
+ <p id="select-option">When you have invoked a popup window for a
+ list of OPTIONs in a form's SELECT block:</p>
+
+ <ul>
+ <li>each OPTION is associated with a number, and that number
+ will be displayed in <em>Form fields are numbered</em> or
+ <em>Links and form fields are numbered</em> mode.</li>
+
+ <li>In any keypad mode, the <em>F_LINK_NUM</em>
+ (&ldquo;<em>0</em>&rdquo;) command will invoke a <em>Select
+ option (or page) number:</em> prompt, and you can enter a
+ number, and optionally a &ldquo;<em>g</em>&rdquo; or
+ &ldquo;<em>p</em>&rdquo; suffix, to select or seek an OPTION in
+ that list.</li>
+
+ <li>If only a number is entered at the prompt, the
+ corresponding OPTION will be selected and the popup will be
+ retracted.</li>
+
+ <li>If the &ldquo;<em>g</em>&rdquo; suffix is included, then
+ you will be positioned on the corresponding OPTION in the list,
+ paging through the list if necessary, but it will not be
+ treated as selected unless you enter the ACTIVATE (RETURN or
+ right-arrow) command when positioned on the OPTION.</li>
+
+ <li>For purposes of paging (e.g., in conjunction with the
+ &ldquo;<em>p</em>&rdquo; suffix), a <em>page</em> is defined as
+ the number of OPTIONs displayed within the vertical dimension
+ of the popup window.</li>
+
+ <li>Finally, the <em>+</em> and <em>-</em> suffixes can be used
+ to move forward or back from the current option or page in a
+ popup menu, similarly to the way they are used for links.</li>
+ </ul>
+
+ <p>For example, while viewing a popup window, the user can type
+ <em>3p+</em> and RETURN to skip ahead 3 pages, and <em>50g-</em>
+ will move the current selection back 50 options. This will work
+ whether or not <em>keypad mode</em> is <em>Form fields are
+ numbered</em> or <em>Links and form fields are numbered</em>
+ since options are numbered internally. If form field numbering is
+ turned off, the option numbers will not appear on screen, but the
+ user can still navigate using these commands.</p>
+
+ <h2><a name="hidden_links" id="hidden_links">Hidden
+ Links</a></h2>
+
+ <p>HTML can be structured so that it includes <em>hidden
+ links</em>, i.e., without a visible link name intended for
+ ACTIVATE-ing the link. Such links may be created, for example,
+ by</p>
+
+ <ul>
+ <li>making an IMG element the sole content of an Anchor
+ element, and including an ALT="" attribute name/value pair to
+ suppress access to the link when the browser does not have
+ support for image handling available.</li>
+
+ <li>having truly empty Anchor content, in cases for which the
+ value of an Anchor's HREF attribute is intended as a navigation
+ aid for robots (typically indexers) and not as content for a
+ browser's rendition of the document.</li>
+
+ <li>using the <em>-ismap</em> command line switch, which makes
+ <strong>Lynx</strong> additionally treat a link to a
+ server-side image maps as hidden if there also is a client-side
+ map for the same image.</li>
+
+ <li>bad HTML, which may produce <em>hidden links</em>.</li>
+ </ul>
+
+ <p><em>Hidden links</em> differ from Anchors that have only a
+ NAME or ID attribute name/value pair (intended as positioning
+ targets from other links which do have HREF attributes and values
+ that include a fragment).</p>
+
+ <p><strong>Lynx</strong> respects instructions for <em>hidden
+ links</em> and normally does not include them in the rendition of
+ the document. However, if the command line switch
+ <em>-hiddenlinks=merge</em> is used, such links will still be
+ numbered in sequence with other links which are not hidden, and
+ if <em>Links are numbered</em> mode is also on, link numbers will
+ appear for them in the displayed text (except for links to image
+ maps which are hidden because of <em>-ismap</em>). If
+ <em>-hiddenlinks=listonly</em> or <em>-hiddenlinks=ignore</em> is
+ in effect, <em>hidden links</em> will not be shown in the text
+ even in <em>links are numbered</em> mode. Not using a
+ <em>-hiddenlinks</em> flag at all is equivalent to
+ <em>-hiddenlinks=listonly</em>.</p>
+
+ <h2><a name="goto_hidden_link" id="goto_hidden_link">Navigating
+ to Hidden Links</a></h2>
+
+ <p>If a document includes <em>hidden links</em>, they will be
+ reported, with appropriate labeling, in the menus created for the
+ LIST (&ldquo;<em>l</em>&rdquo;) or ADDRLIST
+ (&ldquo;<em>A</em>&rdquo;) commands, unless
+ <em>-hiddenlinks=ignore</em> is used. They can then be
+ ACTIVATE-ed via those menus.</p>
+
+ <p>If a link was hidden because of an ALT attribute in an IMG
+ element, it will be converted to a <em>visible link</em> whenever
+ the IMAGE_TOGGLE (&ldquo;<em>*</em>&rdquo;) command is used to
+ create links for SRC attribute values of IMG elements, because
+ this indicates that the user does have some form of image
+ handling enabled via a helper application, or wishes to download
+ files for subsequent use with a graphic browser or other suitable
+ software.</p>
+
+ <p>HTML forms may have fields with a HIDDEN attribute, indicating
+ that a name/value pair for the fields should be included in the
+ content submitted for the form, but the value should not be
+ displayed in the rendered form. <strong>Lynx</strong> respects
+ this attribute as well, and neither displays the HIDDEN field,
+ nor assigns it a number for the F_LINK_NUM
+ (&ldquo;<em>0</em>&rdquo;) command and <em>Form fields are
+ numbered</em> or <em>Links and form fields are numbered</em>
+ keypad mode handling, nor includes an entry for it in the menus
+ created for the LIST (&ldquo;<em>l</em>&rdquo;) or ADDRLIST
+ (&ldquo;<em>A</em>&rdquo;) commands. However, the HIDDEN
+ name/value pairs are included in any displays of submitted form
+ content in the <em>Information about the current document</em>
+ that is invoked by the INFO (&ldquo;<em>=</em>&rdquo;)
+ command.</p>
+</body>
+</html>