Question

I am trying to bind <C-return>. I tried global-set-key but it didn’t work. I then found a suggestion in “Globally override key binding in Emacs” where someone created a custom minor-mode which included their keybindings, like this:

(define-key my-keys-minor-mode-map (kbd "<C-return>") 'insert-and-indent-line-above)

Bit it still won’t replace the current binding. If I do a describe-key and press C-Return it tells me that it is bound to cua-set-rectangle-mark.

How do I make this binding supersede all other bindings?

Answer 1

It sounds like you have cua-mode enabled, which is setting that binding. You can disable cua-mode:

(cua-mode -1)

Or, change the binding for cua-set-rectangle-mark like so:

(setq cua-rectangle-mark-key (kbd "C-S-<return>"))
(cua-mode 1)

And then your binding should take effect (using the global-set-key).