Dell PowerVault 720N Installation And Troubleshooting Manual page 10

wrists relaxed and flat
arms at desk level
xii
Set the monitor at a comfortable viewing distance (usually 510 to 610 millimeters
[20 to 24 inches] from your eyes).
Make sure that the monitor screen is at eye level or slightly lower when you sit in
front of the monitor.
Adjust the tilt of the monitor, its contrast and brightness settings, and the lighting
around you (such as overhead lights, desk lamps, and the curtains or blinds on
nearby windows) to minimize reflections and glare on the monitor screen.
Use a chair that provides good lower back support.
Keep your forearms horizontal with your wrists in a neutral, comfortable position
while you use the keyboard or mouse.
Always leave space to rest your hands while you use the keyboard or mouse.
Let your upper arms hang naturally at your sides.
Sit erect, with your feet resting on the floor and your thighs level.
When sitting, make sure the weight of your legs is on your feet and not on the
front of your chair seat. Adjust your chair's height or use a footrest, if necessary,
to maintain proper posture.
Vary your work activities. Try to organize your work so that you do not have to
type for extended periods of time. When you stop typing, try to do things that
use both hands.
monitor screen at or below eye level
monitor and
keyboard
positioned
directly
in front of user
feet flat on
the floor