Hi MEB,
Thank you for the info. That's better than nothing. But it will still be nice to have the tool revert back if holding the zoom key down and releasing avoiding having to press the button a second time.
Just to give an example - One of the CreativeLive presenters talked about the importance of keyboard shortcuts and gave a quick example. He made an edit in Premiere and added it to the timeline using: A) mouse with drag and drop + clicking icons or menu items vs b) keyboard shortcuts. Result? The keyboard shortcut took about 2-3 seconds and option A) took about 5-6 seconds. He said, repeat that over the course of an 8 hour day and its a HUGE difference in workflow speed.
So it would just be nice to have the feature of holding Z and when releasing reverting back.
Thank you again for the info in the meantime.