Undo, Redo, and Repeat

To...	Do this
Undo.	SelectEdit > Undo or press z.
Redo.	SelectEdit > Redo or press + z.
Repeat the last command.	Select Edit > Repeat or press g.
Repeat a recent command.	Select Edit > Recent Commands List to show a list of recent commands. Hold the space bar to open the hotbox and press in the Recent Commands area on the left to show a menu of recent commands.