User`s guide

Working in Comfort B
Agilent Infiniium 90000 X-Series Oscilloscopes User’s Guide 63
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.
• Try to keep your hand, wrist, and forearm in a neutral position while
using your mouse or other input device.
• 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.
• When using a mouse, trackball, or other input device, position it as
close to the keyboard as possible, and keep it at the same level so you
do not have to stretch while using it.
• Be sure to keep your mouse and trackball clean. Regular removal of
accumulated dust and dirt helps ensure proper tracking and reduces
unnecessary hand and wrist motions.