@top command is a special sectioning command that you
should only use after a ‘@node Top’ line at the beginning of a
Texinfo file. The
@top command tells the
formatter which node is to be used as the root of the node tree.
It produces the same sort of output as
@top node is conventionally wrapped in an
@ifnottex conditional so that it will not appear in TeX
output (see Conditionals).
Thus, in practice, a Top node usually looks like this:
@ifnottex @node Top @top your-manual-title very-high-level-summary @end ifnottex
@top is ignored when raising or lowering sections. That is,
it is never lowered and nothing can be raised to it
(see Raise/lower sections).