Look down:
Press [Shift] + U.

Auto-level:
Press [Ctrl] + [Alt] + 5.

Jump to location:
Press P + [Tab] + T. Enter a location code and press [Enter].

Debug mode:
Press P + [Tab] + D to enter debug mode. The following
information will appear on screen.

Line 1 - Unknown
Line 2 - Coordinates, altitude, speed
Line 3 - Frame Rate.
 
 

Please submit any information regarding this feature.

Recon camera:
Press P + [Tab]. Press one of the following keys while the
recon camera is active to activate the corresponding effect.

Effect     Key
Increase speed     [Plus]
Decrease speed     [Minus]
Increase altitude     [Page Up]
Decrease altitude     [Page Down]
Rotate right     [F3]
Rotate left     [F4]
Up and down rotation     Hold [Shift]
Fine tuning     Hold [Ctrl]
Return to normal mode     ~