The `@subsection'-like Commands
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The `@unnumberedsubsec', `@appendixsubsec', and `@subheading'
commands are, respectively, the unnumbered, appendix-like, and
heading-like equivalents of the `@subsection' command. (Note:`@subsection'.)
In Info, the `@subsection'-like commands generate a title underlined
with hyphens. In a printed manual, an `@subheading' command produces a
heading like that of a subsection except that it is not numbered and
does not appear in the table of contents. Similarly, an
`@unnumberedsubsec' command produces an unnumbered heading like that of
a subsection and an `@appendixsubsec' command produces a
subsection-like heading labelled with a letter and numbers; both of
these commands produce headings that appear in the table of contents.