What Cubase functions have you mapped to your four CC121 FUNCTION buttons?
Currently I use the 2 and 3 function keys to move the locator one bar left or right.
I also have Left Locator on key 1 and Right Locator on key 4 – simply because the CC121 is placed much nearer my MIDI controller than the 1 and 2 keys on my numeric keyboard.
I also use the “value” knob for metronome level. That one’s actually really handy.
Most other function keys I really use a lot, I map to my Stream Deck XL.
Interesting. Makes sense, because it’s close to the jog wheel. I stole that idea for FUNCTION 1 and 2. But now I still have 2 unused buttons…