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<a name="AT9"></a>
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<a name="g_t_00409_003a-Make-index-entry-_0028user_002ddefined-format_0029"></a>
<h4 class="subsection">5.10.6 &lsquo;<samp>@9</samp>&rsquo;:  Make index entry (user-defined format)</h4>

<a name="index-_00409"></a>
<a name="index-Index-entries_002c-user-format"></a>
<p>The construction &lsquo;<samp>@9<i>Text</i>@&gt;</samp>&rsquo; is used to create an index entry in a
format defined by the user.  It is associated with the macro <code>\9</code>, which
will be called during TeX&rsquo;s processing of the Index as
<code>\9{<i>Text</i>}</code>.  The user must define <code>\9</code> according to the format
</p>
<div class="example">
<pre class="example">\def\9#1{...}
</pre></div>
<p>where argument &lsquo;<samp>#1</samp>&rsquo; is the text between &lsquo;<samp>@9</samp>&rsquo; and &lsquo;<samp>@&gt;</samp>&rsquo;.
For example, to print that text in a sans serif font, say
</p>
<div class="example">
<pre class="example">\def\9#1{{\sf #1}}
</pre></div>
<p>(Note the extra level of braces to prevent the font command from propagating.)
</p>



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