Tutorials : Triple rates with non-symmetrical travel
You may want slow roll, normal and 3D rates and prefer a rate switch than a mode switch. Control rates only allow 2 settings.
Instead of the control rates, assign the servo to servomix and input the control three times. Choose a 3 position switch and assign a transfer switch to it. Go to the servo travel screen and for each of the 3 inputs choose the travel which can be different in each direction, and allocate each input to one of the 3 transfer switch settings.