Trackballs are similar to the basic computer mouse. The trackball is a device for pointing and consists of a ball, held in place by a socket that contains a sensor.How to use a TrackballRoll the ball using your thumb, finger or the palm of your hand to position the pointer on your screen. You can use your fingertips to press the buttons on the mouse.Benefits of using a TrackballLess arm and wrist movementLess workspace neededMinimal cleaning neededSome can be programmed for a specific userTypical ApplicationsCommon places where you may use a trackball are on CAD workstations for easy precision, from air-traffic controlling to operating equipment to drafting and design work.