I'm pretty new to this all but I remember something I read.
Regarding page 34 in the English manual of the Minilab MkII open Midi Control Center, select the knob you want to change the acceleration of and set it to
- Mode: NRPN/RPN
- Option: One of the two, depending of what parameter you want to alter with the knob — I don't know if this is relevant at all, see next step:
- LSB and MSB settings: I don't know if in your case it is important to dial in something specific. Manual states: "Use the LSB / MSB fields to specify the parameter number. Min/Max are ignored in this case." As I said, I'm new to this. I would guess it has something to do with controlling an actual device that is expecting specific inputs, but I don't like to give answers based on assumptions.
- Data entry: Set accelaration between "1:128 (coarse)" and "1:1 (fine).
Hit "Save As…" to save as user template, store to device memory slot. ← That I'm sure of.
I hope I could help. If not, you or anyone let me know, please. I'd be happy to learn something here, too.
EDIT
Also, you'll have to switch to the other memory slot that is not #8:
https://www.arturia.com/faq/utilization/ableton-live-control-surface-mappings
