åPosition the mouse at the same height as your keyboard. Allow adequate space to use the mouse comfortably.
åArrange the display so that the top of the screen is slightly below eye level when youÕre sitting at the keyboard. The best distance from your eyes to the screen is up to you, although most people seem to prefer 18 to 28 inches (45 to 70 cm).
åPosition the display to minimize glare and reflections on the screen from overhead lights and nearby windows. If possible, use a tiltable display stand. The stand lets you set the display at the best angle for viewing, helping to reduce or eliminate glare from lighting sources you canÕt move.
Shoulders relaxed
Forearms and hands in a straight line
Forearms level or tilted slightly
Lower back supported
Thighs tilted slightly
| Top of the screen at or |
45Ð70 cm (18Ð28 in.) | slightly below eye level |
| (You may need to adjust |
| the height of your display |
| by raising or lowering |
| your work surface.) |
| Screen positioned to |
| avoid reflected glare |
| Clearance under |
| work surface |
| Feet flat on the floor |
| or on a footrest |
Appendix B Safety, Maintenance, and Ergonomics
81
