The Multiple Undo Shortcut
Need to back up a few steps to re-adjust a setting? Piece of cake. Here’s a shortcut to do just that. You can step back through your History palette (found under the Window menu) by pressing Command-Option-Z (PC: Control-Alt-Z) a few times. This doesn’t delete the items, but takes you back a step in the History palette each time you apply the shortcut.
This is one of the coolest/time saving tricks for an advanced user. I’ve was tired of clicking back and forth to the history for multiple undo’s, and had never thought there was a work-around. What a simple yet effective shortcut..