秀丸っぽくC-zでUndo C-yでRedo

.emac.el

;Undo はC-z
(global-set-key "\C-z" 'undo)

;Redo はC-y
;要http://www.wonderworks.com/download/redo.el
(require 'redo)
(global-set-key "\C-y" 'redo)