I am unaware of a manual dedicated to the Level Up panel but in the Files section here on the MOC forum is a manual for the after-market installation of a Level Up system. *Clicky*
Page 12 has a decent explanation of the panel functions.
Lippert will tell you not to lift the RV by the hydraulic jacks. This is a change from when the system was first advertised. Many attribute the statement to the Lippert lawyers and ignore it (me included). The jacks are more than adequate to handle the weight of the RV (front legs rated at 12,000 lbs. each, rear legs rated at 8,000 lbs each - you do the math
To raise and lower the RV go to "Manual Mode". You then use the appropriate button (Left or Right) to raise one side or the other. The is a "Tilt" prevention detector in the system to avoid you raising one side too high compared to the other side. You have to step the RV up a little at a time on each side. It doesn't require a lot of lift to get the tires to just clear.
Lowering the RV simply requires hitting the "Retract" button and then Left/Right until the RV is back on the ground. I usually do an Auto Level process afterward to get everything leveled out as normal.