Please choose the correct ending to complete the given sentence: Work World: [header] How to adjust office chair height [title] Look for hand controls. [step] Most office chairs have levers located just below the seat, attached to the base. There might be several to control features like the seat height and angle.

Ending1: [substeps] Look for hand controls in front of the seat, on the interior of the chair, or located in the console compartment. Safety seatbelts are located in front of the seat, which prevents someone from jumping over the injured person. Ending2: You can adjust the height by pulling up on the proper lever if you're already in the chair. [substeps] For some models, you will turn a knob instead of pulling on a lever. Ending3: Look for these without turning to check which knobs are visible. Move the knobs again to check for waist (center) and hands controls. Ending4: [substeps] There are other small levers that open up the positions your legs should be in. Levers, like cfls (long), turn the four most tight corners of the spine of the chair, including the head and shoulders.

Answer format: ending1/ending2/ending3/ending4