This is a tip for assigning a rotary-knob to serve as a data-entry knob
instead of the matrix buttons (so you don't have to push all the time,
but you can turn a knob)
How to do it:
Using the bottom row of the matrix go to "Ctrl"/"Device"
Press it, and assign whichever knob you prefer (1 to 8) to "Data Entry".
You can now edit the matrix parameters using the rotary knob you
selected.