(define-key global-map "\C-xr+" 'increment-register)
(define-key global-map "\C-xrc" 'clear-rectangle)
(define-key global-map "\C-xrk" 'kill-rectangle)
(define-key global-map "\C-xr+" 'increment-register)
(define-key global-map "\C-xrc" 'clear-rectangle)
(define-key global-map "\C-xrk" 'kill-rectangle)