Are you talking about the full automatic landing system? Or are you talking about just the front landing legs are hydraulic? If you are talking full auto front and back and side to side then the system should simply level itself after you push the button or switch.
If it is semi-automatic then you control things from your little remote control module. That is a little more challenging but very doable. Just a little practice. We watched Sharon (GypsySCM) set her semi automatic levelers up one time. Wow! Is that nice. It does take a bit of practice but sure beats boards under the wheels.
If you still can't figure it out call Lippert or whoever makes the lifts. They'll be able to tell you how to work them.
HamRad