ARCHIVED: In Emacs, how do I control case sensitivity when searching and replacing?

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The value of the variable case-fold-search determines whether searches are case sensitive:

  (setq case-fold-search nil) ; make searches case sensitive
  (setq case-fold-search t)   ; make searches case insensitive

Similarly, the variable case-replace determines whether replacements preserve case.

To change the case sensitivity for only one major mode, use the major mode's hook, for example:

  (add-hook 'XXX-mode-hook
  (function
             (lambda ()
               (setq case-fold-search nil))))

This information comes from the Emacs FAQ.

At Indiana University, for personal or departmental Linux or Unix systems support, see Get help for Linux or Unix at IU.

ARCHIVED: In Emacs, how do I control case sensitivity when searching and replacing?

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