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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.