Ok, Bliz gave me the RMXP Help file and so here is my new Key Functions tut.
Alt+Enter Alternates between window mode and fullscreen mode. (I'm sure this is already known but for the beginers sake.)
Alt+F4 Exits the game (forced quit).
F12 Returns to the title screen.
F2 When playtesting, shows the fps (frame per second) in the title bar.
F9 When playtesting, press this key down while on the map, but not in an event, to call the debug screen (a list of switches and variables).
Ctrl When playtesting, hold this key down while moving to disable random encounters and travel through impassible tiles.
Well, I hope this tutorial has helped all :D