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Open the logbook and use C-h m to find out what the major mode is. You’ll also find there any documentation for the mode, the keybindings that are active, and a link to the source code should you need it. As a general rule, Emacs is intended to be self–documenting; you can always ask Emacs what is going on, and it always gives you as much information as it ...


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It depends on what kind of changes you make. There's nothing special about code invoked from a hook. If you set a global variable it remains set until something sets it differently or makunbounds it. Your question is general, so the answer is general. If you pose a specific question, e.g. with some code, specific answers can likely be given.


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