Four corners, one sheet of paper
Pick a corner and check it to feel the drag. Raise a corner that is too far, lower one that is too close, and check it again.
Every check and every turn counts as a move. Level all four in par or better.
Play
Level the Bed
Printers with a knob under each corner are leveled by feel: a sheet of paper under the nozzle should drag lightly at every corner.