trackball

A trackball is an input device used to control cursor movement on a screen. Unlike a traditional mouse, which is moved across a flat surface, a trackball remains stationary while the user rotates a ball embedded in the device. This ball can be turned in any direction, allowing for precise control of the cursor without the need for moving the entire device. Trackballs typically feature buttons similar to those found on a mouse for additional functionality, enabling users to click or perform various commands. They are often favored in specific contexts, such as graphic design, video editing, and by individuals with limited desk space or those who prefer ergonomic options, as they can reduce hand and wrist strain associated with continuous movement. The design of a trackball can vary, with some models being designed for one-handed use, while others accommodate two-handed operation.