holy z (of course i totally needed this mac shortcut yesterday). sunday afternoon, i was working on an apartment therapy post and i used the mac shortcut, "command z" (which undoes what you just did). the only problem with command z is when you think you're only undoing a word of text and it takes away all the text! if this has happened to you before, you know exactly the frustration i felt. but there's a solution--shift, command z (it undoes your undo). perfect.