Reply to Layering kontrol S2's default mapping with the MIDI mode - how?

Hey there guys

I am trying to make a custom S2 mapping which is only activated when the SHIFT + SHIFT is pressed (making the S2 go in midi mode) because i really like the default mapping but also wanna add my own custom stuff to the midi mode

however, When I added another mapping (from the menu - NI - S2 - User mapping)

And try to maps things in SHIFT + SHIFT mode, it doesnt register anything?


Am i missing something here? I thought the Shift + Shift mode is like a blank canvas which we can add things on top of the S2 default mapping?

i tried to google things but was unable to get a concrete answer

anyone know how to?