Apple Power Mac G4 (Digital Audio) User Manual

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Appendix B

Maintaining Your Display

To maintain your display and ensure its long life:
m Do not press on the surface of the display screen.
m Do not write on the screen or touch the screen with a sharp object.
m If you will not be using your display and computer for a day or more, turn off the

computer and display or use Energy Saver.

m Turn off your monitor, turn down the brightness, or use a screen-saver program that dims

or varies the image on the screen when the computer is idle for a prolonged time.

Important Ergonomic and Health-Related Information

Here are some guidelines for adjusting the furniture in your office to reduce glare and to
accommodate your physical size and shape.
m An adjustable chair that provides firm, comfortable support is best. Adjust the height of

the chair so your thighs are tilted slightly and your feet are flat on the floor.

The back of the chair should support your lower back (lumbar region). Follow the
manufacturer’s instructions for adjusting the backrest to fit your body properly.

m When you use the computer keyboard, your shoulders should be relaxed. Your upper arm

and forearm should form an approximate right angle, with your wrist and hand in roughly
a straight line.

You may have to raise your chair so your forearms and hands are at the proper angle to
the keyboard. If this makes it impossible to rest your feet flat on the floor, you can use a
footrest with adjustable height and tilt to make up for any gap between the floor and your
feet. Or you may lower the desktop to eliminate the need for a footrest. Another option is
to use a desk with a keyboard tray that’s lower than the regular work surface.

m Position the mouse at the same height as your keyboard. Allow adequate space to use the

mouse comfortably.

m Arrange the monitor so the top of the screen is slightly below your eye level when you’re

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).