The fourth and lowest level sectioning commands in Texinfo are the `subsub' commands. They are:
@subsubsection
@subsection
Command.) In a printed manual,
subsubsection titles appear in the table of contents and are numbered
four levels deep.
@unnumberedsubsubsec
@appendixsubsubsec
@subsubheading
@subsubheading
command may be used anywhere that you need
a small heading that will not appear in the table of contents. In
Info, subsubheadings look exactly like ordinary subsubsection
headings.In Info, `subsub' titles are underlined with periods. For example,
@subsubsection This is a subsubsection
produces
This is a subsubsection .......................
Go to the first, previous, next, last section, table of contents.