Remove all items from the top of the desk surface, including any computers, lights, files and office supplies.
Inspect the legs of the table. Look for adjustment knobs on the table legs. Some tables may have twist sections that allow the legs to move up and down.
Loosen the knob or twist section while holding the top section of the leg. Some tables may have knobs that automatically raise or lower the table while others may require you to hold the leg and tighten the knob when the desired height is reached.
Repeat Step 3 on the other side of the table or the other legs. Inspect the table to ensure it is level.