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<span id="g_t_0040subsubsection"></span><div class="header">
<p>
Next: <a href="_0040part.html" accesskey="n" rel="next"><code>@part</code></a>, Previous: <a href="_0040unnumberedsubsec-_0040appendixsubsec-_0040subheading.html" accesskey="p" rel="prev"><code>@unnumberedsubsec @appendixsubsec @subheading</code></a>, Up: <a href="Chapter-Structuring.html" accesskey="u" rel="up">Chapter Structuring</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Command-and-Variable-Index.html" title="Index" rel="index">Index</a>]</p>
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<hr>
<span id="g_t_0040subsection-and-Other-Subsub-Commands"></span><h3 class="section">5.10 <code>@subsection</code> and Other Subsub Commands</h3>
<span id="subsubsection"></span><span id="index-subsubsection"></span>
<span id="index-unnumberedsubsubsec"></span>
<span id="index-appendixsubsubsec"></span>
<span id="index-subsubheading"></span>
<span id="index-Subsub-sectioning-commands"></span>
<p>The fourth and lowest level sectioning commands in Texinfo are the
‘subsub’ commands. They are:
</p>
<dl compact="compact">
<dt><code>@subsubsection</code></dt>
<dd><p>Subsubsections are to subsections as subsections are to sections.
(See <a href="_0040subsection.html"><code>@subsection</code></a>.) Subsubsection titles appear in the
table of contents.
</p>
</dd>
<dt><code>@unnumberedsubsubsec</code></dt>
<dd><p>Unnumbered subsubsection titles appear in the table of contents,
but lack numbers. Otherwise, unnumbered subsubsections are the same
as subsubsections.
</p>
</dd>
<dt><code>@appendixsubsubsec</code></dt>
<dd><p>Conventionally, appendix commands are used only for appendices and are
lettered and numbered appropriately. They also appear in the table
of contents.
</p>
</dd>
<dt><code>@subsubheading</code></dt>
<dd><p>The <code>@subsubheading</code> command may be used anywhere that you want
a small heading that will not appear in the table of contents.
</p></dd>
</dl>
<p>As with subsections, <code>@unnumberedsubsubsec</code> and
<code>@appendixsubsubsec</code> do not need to be used in ordinary
circumstances, because <code>@subsubsection</code> may also be used within
subsections of <code>@unnumbered</code> and <code>@appendix</code> chapters
(see <a href="_0040section.html"><code>@section</code></a>).
</p>
<p>In Info, ‘subsub’ titles are underlined with periods. For example,
</p>
<div class="example">
<pre class="example">@subsubsection This is a subsubsection
</pre></div>
<p>might produce
</p>
<div class="example">
<pre class="example">1.2.3.4 This is a subsubsection
...............................
</pre></div>
<p>The TeX, HTML, Docbook, and XML output is all analogous to the
chapter-level output, just “three levels down”; see <a href="_0040chapter.html"><code>@chapter</code></a>.
</p>
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