Lamp dimmer, EQ/Comp parameter, Send level, and most of other functions can be controlled by a knob.
One of a new function for it is "Touch and Turn".
You may find a pink circle in LCD screen. When you touch a knob icon in the screen, the pink circle moves to it and a User Defined Knob assigned to "Touch and Turn" can control its value.
This will allow you to maximize convenience of touch screen operation.
User Defined Knob D is assigned to the function as a default. Please try.