Set value of Stabilize and Rate P and R to ZERO

ArduCopter Copter 3.3
1

I have a problem.
I’m configuring a light quad, but I can’t set to ZERO the rate P values and stab P.

For example I would set to 2.5 the Stab P value and rate P_R value not go under 0.08.

I have to do it by in Acro mode?

Thanks so much