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Mice and Other Input Devices
Various aspects of using mice and other input devices
may increase your risk of discomfort or injury.
Observing the following recommendations may
reduce that risk:
• As with the keyboard, try to keep your hand,
wrist, and forearm in a neutral position while
using your mouse or other input device.
• When using a stylus or light pen with a graphics
tablet, don’t grip the stylus tightly. Keep your
hand and fingers relaxed and try to maintain a
neutral posture in your hand, wrist, and forearm.
• If you use your thumb to rotate the ball on a
trackball or spaceball, keep it in a relaxed,
natural shape, and maintain a neutral posture in
your hand, wrist, and forearm.
• Hold the mouse gently by draping your fingers
over it. Keep your hand relaxed and fingers
loose. Do not grip the mouse tightly.
• It takes very little pressure or force from your
fingers to activate the buttons or scroll wheel on
your mouse, scrolling mouse, trackball, or other
input device. Using too much force can place
unnecessary stress on the tendons and muscles
in your hands, wrists, and forearms.
• If you are using a scrolling mouse, be sure to
keep your fingers and hand in a relaxed, neutral
position when activating the scroll wheel. Also,
this type of mouse features software that can
minimize the number of mouse movements or
button clicks.
•
Chapter 1
Preparing to Use Your Computer
19
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