Undo Multiple
Keyboard: UNDO
Reverses the effects of previous commands.
Enter the number of operations to undo or [Auto/Control/BEgin/End/Mark/Back]: To specify the number of steps to undo, enter a value. To undo a menu selection as a single command, choose Auto. To change the Undo settings, choose Control. To group a sequence of operations into a set, choose BEgin. To end the current set, choose End set. To place a mark so you can undo all commands back to this mark, choose Mark. To undo all commands back to this mark, choose Back.
To change the undo settings
Choose Control.
Enter an UNDO control option [All/None/One/Combine/Layer]: To turn the Undo command on, choose All. To turn the Undo command off, choose None. To limit the Undo command to a single undo action, choose One. To combine multiple, consecutive zoom and pan commands into a single undo action, choose Combine and then Yes. To combine the layer dialog actions into a single action, choose Layer and then Yes.
To undo a menu selection as a single command
Choose Auto.
You can use the UNDO Auto command when you want to undo a menu selection with a single U command. If a menu item is not already active, this command inserts an UNDO Begin Set at the start of each menu item and an UNDO End Set when you exit the menu item. To use UNDO Auto, you must have the Control setting for All turned on.