The setup: your using openTX and you set up elevons on a flying wing. Now your flying and you want to trim the elevons up or down. If you move the elevator trim switch (next to the stick) do both elevons (servos) move?
OK how do I say this. @Hai-Lee you may be making an assumption (which I agree is probably correct). When I bought my Jumper T8 with Deviation software I assumed the elevator trim button would do just that, move both servos. It does not. It moves one. You have to use the aileron trim to move the other servo. Maybe I have the mix wrong but its the mix I could find.