A menu consists of an @menu command on a line by
itself followed by menu entry lines or menu comment lines
and then by an @end menu command on a line by
itself.
A menu looks like this:
@menu
Larger Units of Text
* Files:: All about handling files.
* Multiples: Buffers. Multiple buffers; editing
several files at once.
@end menu
In a menu, every line that begins with an * is a menu
entry. (Note the space after the asterisk.) A line that does not
start with an * may also appear in a menu. Such a line is
not a menu entry but is a menu comment line that appears in the Info
file. In the example above, the line Larger Units of Text is a
menu comment line; the two lines starting with * are menu
entries. Space characters in a menu are preserved as-is; this allows
you to format the menu as you wish.