One Swich for 2 servos

ArduCopter
1

I want to use just one Swich on the transmitter to trigget 2 servos at the same time installed on aux3 and 4.is that possible?

2

Sure. Set SERVOx_FUNCTION for 2 outputs for the RCIN chan the switch is on.

So if the switch is on RC in Chan 9 and the servo outputs are on AUX 3 and 4 then:
SERVO11_FUNCTION to 59
SERVO12_FUNCTION to 59

3

Thanks so much really help me out!