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Emacs provides extensive help features accessible through a single
character, `C-h'. `C-h' is a prefix key that is used only for
documentation-printing commands. The characters that you can type after
`C-h' are called "help options". One help option is `C-h'; that is how
you ask for help about using `C-h'.
`C-h C-h' prints a list of the possible help options, and then asks
you to go ahead and type the option. It prompts with this string:
a b c f i k l m n p s t v w C-c C-d C-n C-w. Type C-h for more help:
You should then type one of those characters.
Typing a third `C-h' displays a description of what the options mean;
it still waits for you to type an option. To cancel, type `C-g'.
`C-h' means "help" in various other contexts as well. For example,
in `query-replace', it describes the options available.
- Help Summary
- Brief list of all Help commands.
- Key Help
- Asking what a key does in Emacs.
- Name Help
- Asking about a command, variable or function name.
- Asking what pertains to a given topic.
- Library Keywords
- Finding Lisp libraries by keywords (topics).
- Misc Help
- Other help commands.
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