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EDIT: I understand there is keyboard-quit (which is normally bound to C-g); but I'm more interested to know about how one deals with editing functions that come with Emacs (like in this case). I run into this kind of situations from time to time when I want to change just a little bit of some build-in functions. In emacs, when you hit M-ESC ESC (or ESC three times), you can get out of a lots of situations like transient-mark, etc. But I habitually hit the escape key (I actually remap this to a single hit of the escape key) more than I intended, and that ends up killing my windows configuration, which is quite annoying. The function keyboard-escape-quit is defined in simple.el: (defun keyboard-escape-quit () "Exit the current \"mode\" (in a generalized sense of the word). This command can exit an interactive command such as `query-replace', can clear out a prefix argument or a region, can get out of the minibuffer or other recursive edit, cancel the use of the current buffer (for special-purpose buffers), or go back to just one window (by deleting all but the selected window)." (interactive) (cond ((eq last-command 'mode-exited) nil) ((> (minibuffer-depth) 0) (abort-recursive-edit)) (current-prefix-arg nil) ((and transient-mark-mode mark-active) (deactivate-mark)) ((> (recursion-depth) 0) (exit-recursive-edit)) (buffer-quit-function (funcall buffer-quit-function)) ((not (one-window-p t)) (delete-other-windows)) ((string-match "^ \\*" (buffer-name (current-buffer))) (bury-buffer)))) And I can see that I don't want the lines: ((not (one-window-p t)) (delete-other-windows)) But what is the best way to modify this function? I can see only two ways: 1) modify simple.el 2) copy this function to my .emacs file and do the modifications there. Both ways are not really good ; ideally I would

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