**** EPA, or End Point Adj. ****
▲ enter Trim Mode
▲ unplug the lipo of your bird and plug it back in to enter EPA adj.
▲
△ to set Alireon left end point, push&hold right stick to max. left positon, press T4 to adjust.
△ to set Alireon right end point, push&hold right stick to max. right position, press T3 to adjust.
△ to set Elevator forward end point, push&hold right stick to max. forward position, press T1 to adjust.
△ to set Elevator backward end point, push&hold right stick to max. backward position, press T2 to adjust.
▲ press the back button to save&exit when done.
I would recommend to carefully watch the servos move when you do this EPA trim. Stop moving when the servo sliding block is 1mm apart to the hardware limit. Hitting the hardware limit will cause the servo lock up, you may have to manually spin the tiny servo gear to rescue it from the lock-up.
Finally I think I must make a picture to explain what T1~T4 here all stand for. It's the four trims in futaba order, T1~T4 from right to left.
Wish this helps.