How to change ATC_THR_MIX_MAN value out of range?

Yeah, I’m flying FPV (I can disarm when landing :wink:). And I think I need a nice landing without bouncing up and down.

Currently, I have met attitude hold issue: Why punch/cut throttle makes drone pitch back?

So I just wanna try this value to hold attitude when punch/cut the throttle to see if there is any improvement.