Thank you for this. Had the same problem. Initially this didn't work for me as I got the error msg "Control Surface: Error Opening MIDI Inputs and Outputs". Problem was in Preferences -> MIDI devices, MIDIIN2 (Keystation 49) needed to be disabled. Once I did that it worked.
For anyone else with an M-Audio Keystation, the button in the center of the directional controls toggles those controls between zooming and scrolling.
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