Calibrating Pitch and Roll
You can set the angle of your vehicle to zero at any time.
- Park your vehicle on a flat, level surface.
- Adjust the position of your device in the mount so you can comfortably view the screen.
-
Select
> 
> Pitch and Roll > Calibrate.
The values for pitch and roll reset to 0 degrees.
To maintain the best accuracy, you must calibrate pitch and roll each time you reposition your device.