Using my samsung S5 and Ipad I found these as custom options in the app
Please note that quad was powered on when investigated , the quad powered off shows less options
In Android...................................................... In DJI go
Camera settings ..............................................Turn on/off Head Leds
Centre forward/down........................................Centre weighting Metering
FPV Mode/Follow mode...................................AE Lock/Unlock
Switch GS/FPV.................................................advanced Camera settings
Clear flight route.............................................. Camera forward Down
battery info........................................................Gimbal follow/FPV mode
centre metering.................................................{NOW SLIDE UP LIST}
{ NOW SLIDE UP LIST}................................... Toggle map live view
turn off front leds................................................battery info
Navigation..........................................................Navigation
Replay................................................................Playback
AE Lock/Unlock..................................................centre auto focus
Centre Auto Focus.............................................Right dial ISO/Shutter Control
Right dial ISO/Shutter Control...........................Undefined
Undefined