Many thanks Krysta, with your latest instructions, I'm making important progress. Now I know that FLP2 is the Function assigned to Channel 6. I am able to move the Left Aileron now, both on the Preset, and on the Throttle Stick.

On last thing: with Butterfly On (Switch A down), while lowering the Flaperons, the elevator moves down to compensate for pitch up. This is what I want to use. But the Pmix 6 and 7 to move the Flaperons all the way up with throtle off do not work. They only work with Butterfly Off, Switch A up. How can I link the 2 functions, i.e.:

1- Butterfly off, Switch A up : no effect on Flaperons when moving the throtle stick
2- Butterfly on, Switch A down: Flaperons droping when lowering the throtle stick, and move up completely with the throtle stick in the full down position. Elevator are coupled to the flaperons for pitch compensation.

Thanks for your prompt and effective support.
M.