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 <title>Help on the Follow link (or page) number feature</title>
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 <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>

If a user has set one of these modes, (as the default or for
 the current session via the Options menu) then hypertext
 links (and form fields, depending on the keypad mode) are
 prefixed with numbers in square brackets:

<ul>
 <li>Keypad mode to Links are numbered,
 or</li>

<li>Form fields are numbered, or</li>

<li>Links and form fields are numbered
 </li>
 </ul>

Entering a keyboard or keypad number is treated as an
 F_LINK_NUM command, and should invoke the Follow
 link (or goto link or page) number: statusline prompt for a
 potentially multiple digit number corresponding to an indicated
 link number.

<h2><a name="numbering" id="numbering">Zero and other digits</a></h2>

The prompt can be invoked via typing a zero (0), 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.

In Form fields are numbered or Links and form
 fields are numbered 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.

If the user has set Keypad mode to Numbers act as
 arrows, then only a zero digit will be treated as an
 F_LINK_NUM command for invoking the Follow link (or
 goto link or page) number: prompt.

<h2><a name="suffixes" id="suffixes">Suffixes</a></h2>

After accepting a number at the prompt, Lynx
 accepts an optional suffix:

<dl>
 <dt>RETURN (activate)</dt>

<dd>Without a suffix, e.g., If RETURN is pressed to
 terminate the number entry (e.g., 123) and it
 corresponds to a hypertext link, Lynx 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>

<dd>
 If the number entered at the prompt has a
 &ldquo;g&rdquo; suffix (e.g., 123g), then
 Lynx 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;g&rdquo; suffix is inferred (need not be
 entered) for form fields in Form fields are numbered
 or Links and form fields are numbered mode.
 </dd>

<dd>
 Alternatively, if the number is given a
 &ldquo;p&rdquo; suffix (e.g., 123p),
 Lynx 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;g&rdquo; and &ldquo;p&rdquo;
 suffixes thus convert the Follow link (or goto link or
 page) number: feature to an advanced navigation aid.
 </dd>

<dd>
 Finally, a user may add a + or - suffix
 to a number command to indicate jumping forward or back
 relative to the current link or page. For example, typing
 1g+ followed by RETURN will move the current link to
 the next numbered link, skipping any intervening pages or
 unnumbered links; 1g- goes to the preceding numbered
 link. On a page without links, 3g+ goes to the 3rd
 link following the page. 5p+ skips ahead 5
 pages, and so on. You can also enter 5+ or
 5-, which will activate the 5th link ahead/behind
 where you are currently positioned. Note that typing
 1g+ is different from typing a down arrow in that
 1g+ 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 &lt;tab&gt;
 command in that 1g+ does not skip over whole
 textareas, unless form fields are not numbered.

NOTE: 1+g 1-g 1+p 1-p are all recognized
 as equivalent to 1g+ 1g- 1p+ 1p- . Any other
 (mistyped) characters end the formula: e.g. 1gh+ is
 treated as 1g.
 </dd>
 </dl>

<h2><a name="form_fields" id="form_fields">Specifics for Form
 Fields</a></h2>

Numbers are associated with form fields only when

<ul>
 <li>Form fields are numbered or</li>

<li>Links and form fields are numbered mode has been
 selected.</li>
 </ul>

If you have selected Numbers act as arrows or
 Links are numbered 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.

When you have invoked a popup window for a
 list of OPTIONs in a form's SELECT block:

<ul>
 <li>each OPTION is associated with a number, and that number
 will be displayed in Form fields are numbered or
 Links and form fields are numbered mode.</li>

<li>In any keypad mode, the F_LINK_NUM
 (&ldquo;0&rdquo;) command will invoke a Select
 option (or page) number: prompt, and you can enter a
 number, and optionally a &ldquo;g&rdquo; or
 &ldquo;p&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;g&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;p&rdquo; suffix), a page is defined as
 the number of OPTIONs displayed within the vertical dimension
 of the popup window.</li>

<li>Finally, the + and - 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>

For example, while viewing a popup window, the user can type
 3p+ and RETURN to skip ahead 3 pages, and 50g-
 will move the current selection back 50 options. This will work
 whether or not keypad mode is Form fields are
 numbered or Links and form fields are numbered
 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.

<h2><a name="hidden_links" id="hidden_links">Hidden Links</a></h2>

HTML can be structured so that it includes hidden
 links, i.e., without a visible link name intended for
 ACTIVATE-ing the link. Such links may be created, for example,
 by

<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 -ismap command line switch, which makes
 Lynx 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 hidden links.</li>
 </ul>

Hidden links 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).

Lynx respects instructions for hidden
 links and normally does not include them in the rendition of
 the document. However, if the command line switch
 -hiddenlinks=merge is used, such links will still be
 numbered in sequence with other links which are not hidden, and
 if Links are numbered 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 -ismap). If
 -hiddenlinks=listonly or -hiddenlinks=ignore is
 in effect, hidden links will not be shown in the text
 even in links are numbered mode. Not using a
 -hiddenlinks flag at all is equivalent to
 -hiddenlinks=listonly.

<h2><a name="goto_hidden_link" id="goto_hidden_link">Navigating
 to Hidden Links</a></h2>

If a document includes hidden links, they will be
 reported, with appropriate labeling, in the menus created for the
 LIST (&ldquo;l&rdquo;) or ADDRLIST
 (&ldquo;A&rdquo;) commands, unless
 -hiddenlinks=ignore is used. They can then be
 ACTIVATE-ed via those menus.

If a link was hidden because of an ALT attribute in an IMG
 element, it will be converted to a visible link whenever
 the IMAGE_TOGGLE (&ldquo;*&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.

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. Lynx respects
 this attribute as well, and neither displays the HIDDEN field,
 nor assigns it a number for the F_LINK_NUM
 (&ldquo;0&rdquo;) command and Form fields are
 numbered or Links and form fields are numbered
 keypad mode handling, nor includes an entry for it in the menus
 created for the LIST (&ldquo;l&rdquo;) or ADDRLIST
 (&ldquo;A&rdquo;) commands. However, the HIDDEN
 name/value pairs are included in any displays of submitted form
 content in the Information about the current document
 that is invoked by the INFO (&ldquo;=&rdquo;)
 command.
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