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As indicated at the beginning, this is not a complete reference
manual. It has not covered
tab setting, the mail system, the Emacs internal Lisp dialect,
automatic abbreviation, the spelling checker, the directory editor,
the change-log editor, or how to replace all groups of lines of your program
that are indented more than ARG spaces by `9#9'.
You can learn about these and other topics by using C-h i. You
might also try typing C-h f SPC C-x o, which creates a buffer
containing the names of all Emacs functions and then puts the cursor
there so that you can scroll through and look for likely-sounding names.
Just use it. Every session is an adventure.