Do you mean elevons? Which is when you mix the ailerons with the elevator so you can have two servos do the job of both elevator and ailerons.
I have no idea about that transmitter, but I do know that they make a "V-Tail mixer" which is a small device that plugs into the receiver and the servos to make a elevon mix. You could buy the transmitter if that is the only "problem" you have with it and if it does not allow for elevon mixing, then you could buy a v-tail mixer.
Here is a v tail mixer that Hobby King sells. But other places sells them too.