How do I level the Thin Twin washer/dryer after installation?

Tilt the washer/dryer forward to raise the back legs 1 inch off the floor, allowing the rear self-leveling legs to adjust, then gently lower it and check levelness with a carpenter's level placed on top — first side to side, then front to back. If not level, tilt the unit backward until the front is 3–4 inches off the floor, insert corner posts about 6 inches from the left leg, and adjust the front legs up or down. Once level, tighten the nuts on the front legs firmly against the base to prevent vibration. (Page 5)