Displays your current position in X,Y coordinates. Grasp the chain saw for you. Press 1 to use it. Jumps to requested level. Allows to walk through walls and get things by running into them.
Second time shows all enemies and objects.
Typing it four times while holding the control key during a death match will reveal the other players. Displays your current position in X,Y coordinates. Change music to the music of the requested level. If you have the Open Door key, you can quickly locate secret passages quick by pressing the Open Door key on the run. You don't have to stand still to have the key working.