Using the Trackball

In recent years, medical attention on occupational injuries has identified normal, seemingly harmless activities as a potential cause of a wide range of problems collectively known as Repetitive Stress Injuries (RSI) or Cumulative Trauma Disorders (CTD). It is now recognized that any repetitive motion may contribute to these health problems. As a computer user, you might also be at risk.

By paying attention to the way you perform your work, use your computer and phone, play sports, and work around the house, you can identify the behaviors that may be putting you at risk. If you experience pain, swelling, numbness, or weakness in your wrists or hands (especially during sleep), see your physician immediately. These symptoms could mean that you are developing a repetitive stress injury that requires prompt medical attention. For more detailed information, consult your doctor or a reputable book.

Most users find the best way to handle a trackball is by using the fingertips to control the ball while using the thumb and pinky, or ring finger to click the buttons. Try the following steps to find your most comfortable hand position.

Place your hand over the top of the Expert Mouse, with the heel of your hand at its base or on the wrist rest. Relax your wrist and fingers. Note where your fingers fall on the trackball and which buttons are easiest to reach. If you would like, reprogram the mouse buttons to best suit your hand position.