Hi, Rudi!
So what you want is an influence of either spoiler or flap on other controls to move them into a special position - e. g. thermal or speed. Of course, this only works when mixers are involved that inlcude flap or spoiler values (eg. ailmix, elevmix etc.).
The magic word now is "fixed values" or just "FIX" and this is done in the controls menue. So open the menue with the controstick, hit the first option (Gebereinstellung, control adjustment). For the controls spoiler and flap you now can set values as might be needed in you case.
For that you might consider the pages 19 (German manual) or 42 (English manual) of the manual for version 1.30.
w/r
profimc