Safety Information 13
Ergonomic Computing Habits CAUTION: Improper or prolonged keyboard use may result in
injury.
CAUTION: Viewing the monitor screen for extended periods of
time may result in eye strain.
For comfort and efficiency, observe the following ergonomic guidelines
when setting up and using your computer system:
•Position your system so that the monitor and keyboard are directly in
front of you as you work. Special shelves are available (from Dell and
other sources) to help you correctly position your keyboard.
•Set the monitor at a comfortable viewing distance (usually 51 0 to
610 mm [20 to 24 inches] from your eyes).
•Ensure that the monitor screen is at eye level or slightly lower when
you are sitting 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 using the keyboard or mouse.
•Always leave space to rest your hands while using 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, ensure that 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.