C-h i ( info) runs the Info program, which is used for browsing
through structured documentation files. The entire Emacs manual
is available within Info. Eventually all the documentation of
the GNU system will be available. Type h after entering Info to
run a tutorial on using Info. If you specify a numeric argument,
C-h i prompts for the name of a documentation file. This way,
you can browse a file which doesn't have an entry in the top-
level Info menu. It is also handy when you need to get to the
documentation quickly, and you know the exact name of the file.
There are two special help commands for accessing Emacs
documentation through Info. C-h C-f function RET enters Info and
goes straight to the documentation of the Emacs function
function. C-h C-k key enters Info and goes straight to the
documentation of the key key. These two keys run the When
editing a program, if you have an Info version of the manual for
the programming language, you can use the command C-h C-i to
refer to the manual documentation f