Assuming you are referring to a manual seat adjustment in a car:
Most cars have manual seat adjustments, which allow the driver and passengers to adjust their seats to their desired positions. There are generally two ways to adjust a manual seat: by using levers or by using handles.
Lever-operated adjustments are usually found on the side of the seat near the door, while handle-operated adjustments are usually located on the front or back of the seat. To adjust a lever-operated seat, simply pull or push the lever in the desired direction. To adjust a handle-operated seat, turn the knob or handle in the desired direction.
Most manual seats can be adjusted forwards, backwards, up, down, and sometimes even tilted at an angle. This gives drivers and passengers a wide range of options when it comes to finding their perfect seating position.