Which parameter to mix Yaw?

Is there a parameter to mix the motor throttle used for the yaw ?

My hexa increase altitude when I use the yaw : I can hear the accelerating motors doing too much compared to the motors which are decelerating.

I did not find a solution to my problem. May hexa raises when I use the yaw.
I joint the log file, but I could not join the params file (“The extension param is not allowed.” even if I change the extension).

Somebody can help me ?