The Aerocreeper was designed for simple maintenance and operation. Simply adjust the creeper to the desired height before getting on.
To raise the seat, just lift up on the top of the backrest to the desired height - it will automatically lock into position. The seat will remain securely locked until you want to lower it.
To lower the seat, simply lift up on the front of the seat while securing the back rest with your other hand. Lower the seat to the desired position then let go of the seat while still holding the backrest with your other hand. The seat will automatically lock into position.
The backrest must be held while lowering the creeper so that it does not go down faster than desired. Also, holding the backrest while lowering makes it easy stop at the desired position.