you need to set it up as a helicopter... and then program a pitch curve and throttle curve in Idle1 mode...

sadly the Idle modes are hard coded to swG on the 9CA (swE if it is a 9CH)

so E would work if you have the heli version.... but you would use the switch to change from normal mode to idle1 mode

but like I mentioned you need to set everything up in parameter as a helicopter then start playing with curves.....