In Emacs, C-h k or C-h m will show you the help regarding what function is bound to the key or what keys are bound in the buffer you're currently working on. If it's a drag to scroll through the entire list or if you want to narrow it down, you can press the prefix keys and then C-h to get only those keybindings that start with the prefix key.
For example, pressing the prefix C-x r and then C-h (C-x r C-h) will only show the help regarding the key bindings starting with the prefix C-x r. This is useful when you enable a minor mode that has a prefix key combination that you use infrequently. In the normal case, you'd have to invoke C-h m and then scroll down to the respective section in the help buffer. If you knew the prefix, then pressing the prefix followed by C-h will be "context" sensitive help.
Based on the thread here on gnu.emacs.help.
For example, pressing the prefix C-x r and then C-h (C-x r C-h) will only show the help regarding the key bindings starting with the prefix C-x r. This is useful when you enable a minor mode that has a prefix key combination that you use infrequently. In the normal case, you'd have to invoke C-h m and then scroll down to the respective section in the help buffer. If you knew the prefix, then pressing the prefix followed by C-h will be "context" sensitive help.
Based on the thread here on gnu.emacs.help.
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