@top Sectioning Command
A special sectioning command, @top, has been created for use
with the @node Top line. The @top sectioning command tells
makeinfo that it marks the `Top' node in the file. It provides
the information that makeinfo needs to insert node
pointers automatically. Write the @top command at the
beginning of the line immediately following the @node Top
line. Write the title on the remaining part of the same line as the
@top command.
In Info, the @top sectioning command causes the title to appear on a
line by itself, with a line of asterisks inserted underneath.
In TeX and texinfo-format-buffer, the @top
sectioning command is merely a synonym for @unnumbered.
Neither of these formatters require an @top command, and do
nothing special with it. You can use @chapter or
@unnumbered after the @node Top line when you use
these formatters. Also, you can use @chapter or
@unnumbered when you use the Texinfo updating commands to
create or update pointers and menus.