(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-xrd" 'delete-rectangle)
(define-key global-map "\C-xry" 'yank-rectangle)
(define-key global-map "\C-xro" 'open-rectangle)
(define-key global-map "\C-xrt" 'string-rectangle)