Undo and Redo on Macbook not functioning The CtrlZ and ShiftCtrl + Z combinations are essentially ignored on my Macbook. It's behaving like an unqualified Z key press.  How do I get that to work on Macbook or is there another means of performing undo/redo?
On Mac OS X the keyboard shortcuts for undo and redo are CmdZ and ShiftCmdZ, consistent with other applications on this operating system.