Sub 37 tune knob not working as a value function

Hi everyone

My issue is pretty much as the title say, when in edit mode I’m no longer able to use the tune knob to change values, it just adjusts the tune.

This used to work, I’m sure even since updating, but it has suddenly stopped.

I’m hoping it’s a simple option menu somewhere, but can’t seem to find it.

Any help would be great.

GLOBAL MENU (2.4) → FINE TUNE : TUNE,EDIT (manual page 47)

Thank you.