Upper arms hang loosely from the shoulder. Forearms extend horizontally to the floor towards the keyboard. Mouse is next to the keyboard at the same level. You are centered in front of the monitor. The monitor screen is at right angles to any windows.
Eyes are at a comfortable distance from the monitor.
Eyes look down at the monitor at a 15-20 degree angle. If telephone use is frequent, use a headset instead of a handset. Checklist for health at a computer workstation Use the following checklist to evaluate your posture and computer workstation design. Chair arm rests are optional. If used, they should be padded, not hard.