Good suggestion. I'm a little new to the sport and my Crystal Sky Go4 app doesn't have this functionality.
So I used my iphone Go4 app and calibrated the IMU and compass; however, calibration for the gimbal doesn't do anything-nothing happens. Also, I can't adjust rotation on the gimbal or control gimbal with the controller dial.
The gimbal does go through a sequence of movements on power-up and it will maintain camera direction when you move the drone around, so it seems to be working at some level.
Also, I can't use my camera, e.g., can't change any settings, take pictures or videos. I tried resetting the camera in the Go4 app camera settings menu, but nothing changed.
Also, reloaded the latest Mavic Pro Platinum firmware v.v01.04.0500 using DJI Assistant 2 v1.2.5 with no luck.
So unless anyone has any suggestions, will have to go to technical support.
Maybe having the camera collar in place while updating the MPP caused the problem, as the drone worked fine immediately before that process?