choose a chair to reduce fatigue from sitting in the same position for long periods.
the backrest and seat should adjust independently and provide good support. the seat should have a curved front to relieve pressure on the thighs.adjust the seat so that your thighs are parallel to the floor and your feet are either flat on the floor,or on a footrest.
when using the keyboard,keep your forearms parallel to the floor and your wrists in a neutral,comfortable position.try to keep a light touch on the keyboard,and your hands and fingers relaxed.change the angle of the keyboard for maximum comfort by adjusting the position of the keyboard feet.
adjust the monitor so that the top of the screen is at,or slightly below,eye level.place the monitor at a comfortable viewing distance,usually 51 to 61 cm (20 to 24 in.),and position it so that you can view it without having to twist your body.