LIFT AND TILT FUNCTIONS: To raise or lower the chair's height: Pull the lever UP with force. The chair will go down while sitting you lift your body. WARNINGS: = Do not stand up on the chair. = Do not use the chair as a ladder. = Use for seating only one person at a time. At least every 4 months, check all bolts, screws and knobs fo be sure they are tight. Do not use if parts are loose, damaged or missing. = Failure to follow the above warnings could result in serious: injury.