CrystalSky Ultra-brite sent back from DJI repair will take Screen Snapshots if I use the sub-menu screen touch button.
However, assigning Custom F2 key to Screen Snapshots does not work.  Neither does assigning Custom F1 key to toggle Screen brightness to Max on & off work.
Prior to sending CrystalSky Ultra-brite in, I could assign Custom F1 & F2 keys to one of their listed options.  


Is there a not so obvious option that enables or disables Custom F1 & F2 keys?

Tried Updating CrystalSky OS.  

F1 & F2 keys still do not function, even when set to other listed options.

Opened a ticket with DJI over function key problems.
From initial email I got back, CrystalSky will have to go back in to DJI.
If it wouldn't void warranty, I would open CrystalSky up to see if two function keys are even hooked up inside!

Spent far more time messing with two CrystalSkys problems, than I have gotten to use them.

HedgeTrimmer Posted at 2018-8-31 09:27
Opened a ticket with DJI over function key problems.
From initial email I got back, CrystalSky will have to go back in to DJI.
If it wouldn't void warranty, I would open CrystalSky up to see if two function keys are even hooked up inside!

Sadly, no resolution on customizable F1 & F2 keys (function buttons).
CrystalSky Ultra brite, is off to DJI Service center.  

DJI is either going to replace or repair CrystalSky Ultra.
Emailed repair Invoice does not give any details as to what is/was wrong with F1 & F2 keys.