I was just looking at the Go app, and trying to figure out what some of the functions do. I can not find this in the manual, if it there just point me to it. If not can some one explain the following functions:
Under MC Settings: Advances Settings: Stick filtering and
Under MC Settings: Advances Settings:Gain

thanks

1.  Never heard of it, it's new, probably nothing - leave it alone
2.  Leave gains alone.

'Stick Filtering' is the name the Android version of DJI Go gives to the 'Sensitivity' settings option in the IOS version.

TOMS TECH TIME has some really good tutorials for the P4.
http://www.tomstechtime.com/tutorials/phantom-4/

scroll down to the P4 camera settings. He explains a lot in his tutorials, and recommended settings.  hope this helps.