GNU Emacs Manual - Basic Help

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## Help

If you forget what a key does, you can find out with the Help character, which is `C-h` (or `F1`, which is an alias for `C-h`). Type `C-h k` followed by the key you want to know about; for example, `C-h k C-n` tells you all about what `C-n` does. `C-h` is a prefix key; `C-h k` is just one of its subcommands (the command `describe-key`). The other subcommands of `C-h` provide different kinds of help. Type `C-h` twice to get a description of all the help facilities. See section Help.

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