Online Help
The emacs help system is always available. With the default key bindings, you can start it with CONTROL-H. The help system then prompts you for a one-letter help command. If you do not know which help command you want, type ? or CONTROL-H. This switches the current window to a list of help commands, each of them with a one-line description, and again requests a one-letter help command. If, while still being prompted about what help you want, you decide you do not want help after all, you can type CONTROL-G to cancel your help request and get back to your former buffer.
If the help output is only a single line, it appears in the Echo Area. If it is more, the output appears in its own window. To scroll this output you can use SPACE ...
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