Multiplex Profi Tx Manual page 20

ii) Using Flight Phases to adjust mixer inputs
If you wish to have a varying amount of mix depending on
what flight phase you are in, e.g. say you wish to have more flap
movement in the launch phase and less in the thermal phase this can
be accomplished by using two input lines in the mixer definition screen
activated by separate switches and then entering different values in
the mixer menu.
In the mixer definition menu in
setup (ABC1) add two inputs from
the same control with separate mix
switches. Here on the FLAP_INNR+
I've created two inputs for the flap
control, inputs 1 and 3, and
activated by flightphase 1 and 2.
Note the curves are the same, but
you could if you wish have different
effect curves
Royal Pro/Sx – Mixers
5 - Other
In the mixer set up menu
(GHI3) different values can
be entered for the two
separate flap inputs.