Can i turn ON self level using a 4ch tx on KK2.1?

I think there has to be an option to activate self stablization using sticks only.

see manual for more options.

I dont think so,it's not possible you need one more channel to do so

Turning on self level via the sticks depends on the firmware. I don't think there is an option in the RC911 AIO firmware. In the standard or Steveis firmware, go to the Mode Settings menu and set self level to 'stick'. To activate self level, hold the aileron stick to the right while arming. Hold it to the left to disable.

yup, SK1701, correct .. just do it manually .. i did the same despite having a 8ch Rx

Many many thanx to u guys.