When the minibuffer offers tab completion, how can I make that case-insensitive?
Preferably a global setting that makes any completion – a filename, a command, ido, etc. – obey that setting.
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Sure. Set variable completion-ignore-case to t. Put this in your init file:
(setq completion-ignore-case t)
C-h v completion-ignore-case:
completion-ignore-caseis a variable defined inC source code.Its value is
nilDocumentation:
Non-
nilmeans don't consider case significant in completion.For file-name completion,
read-file-name-completion-ignore-casecontrols the behavior, rather than this variable.For buffer name completion,
read-buffer-completion-ignore-casecontrols the behavior, rather than this variable.
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Can you update the answer to say which version of Emacs this appears in? Also, why this doesn't appear in the ‘completion’ group for Customize? – bignose Apr 28 '17 at 5:14
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It appears in every GNU Emacs version I'm aware of, going back at least as far as Emacs 20. Did you try
C-h v completion-ignore-case? Does your Emacs version not find this variable? Are you using GNU Emacs or some other Emacs? – Drew Apr 28 '17 at 14:44 -
It does not appear in
M-x customize-group completionbecause it is not a user option. You can set it but you cannot set it using Customize. The most common use of it is to bind it (not assign it) in a given command. But nothing prevents you from assigning it, to affect the general behavior. – Drew Apr 28 '17 at 14:46
