GCS_PID_MASK or AUTOTUNE_BITMASK missed

ArduCopter Copter 3.3
1

Hello,

I search the parameter for autotune.
I miss GCS_PID_MASK.
What is the parameter for it?

Additional:
If I use AUTOTUNE as special mode in Channel6, it work.
If I use AUTOTUNE as flight-mode it dosn’t work?