Variable: cua-enable-cua-keys
cua-enable-cua-keys is a customizable variable defined in
cua-base.el.gz.
Value
t
Documentation
Enable using C-z, C-x, C-c, and C-v for undo, cut, copy, and paste.
If the value is t, these mappings are always enabled. If the value is
shift, these keys are only enabled if the last region was marked with
a shifted movement key. If the value is nil, these keys are never
enabled.
Probably introduced at or before Emacs version 22.1.
Source Code
;; Defined in /usr/src/emacs/lisp/emulation/cua-base.el.gz
(defcustom cua-enable-cua-keys t
"Enable using C-z, C-x, C-c, and C-v for undo, cut, copy, and paste.
If the value is t, these mappings are always enabled. If the value is
`shift', these keys are only enabled if the last region was marked with
a shifted movement key. If the value is nil, these keys are never
enabled."
:type '(choice (const :tag "Disabled" nil)
(const :tag "Shift region only" shift)
(other :tag "Enabled" t)))