That's the first I'm hearing of NAW running on a graphic tablet! Does the tablet run Windows?
Full screen not happening is a resolution limitation that can be removed in the upcoming versions which have much better UI code. I'll look into that.
I don't know about ctrl-z key. Is that a dedicated undo key in the tablet? I'd need more info on it to implement it. Currently the code checks for a "control" key being held and then a "Z" key being pressed.