Radio DX7 vs DX8 or suggestions

[Hotwheels]

I plugged shift servo in to rudder on receiver? throttle left and right controlling shifter. Any idea what the rudder triple switch is to perform? I am trying to get up to speed reading the manuals that came with dx8.

[Hotwheels]

I think I am figuring this out now, rudder control alway's throttle stick left and right. So does that mean toggle 0 set for shifting, then toggle 1 can be set up to perform another function and the same with number 2. Flip switch then right and left on throttle?