Video: Nick Shabazz
Trackball Mouse and Its Usability
A trackball mouse sometimes called a “trackpoint,” is a pointing device that consists of one or more ball sensors housed in roller-bearing encased in an upside-down T-shaped housing. The trackball uses its sensors to detect which direction the ball is moved, rather than where it’s pointed. It was designed for users with disabilities who cannot use a regular mouse. A trackball mouse works like any other pointing device. It has a ball and two buttons,