Microsoft Flight Simulator 1998
Press "Y" in flight or before take-off. Then, press [F4] to
increase altitude, [F3] to decrease altitude, [F2] to move
forward, and [F1] to stop. The cursor keys may also be used
to move the aircraft.
Press Y to resume normal flight.
Type bgry. The screen will freeze and red writing will appear.
Press [Cursor Up] to fly quickly forward or [Cursor Down] to
move quickly backwards.