What is scroll-ball?

Answer 1

Scroll-ball is a type of input device used primarily in computer mice, featuring a ball that can be rolled in any direction to scroll through content on a screen. It allows for smooth navigation by detecting movement in multiple directions, making it versatile for scrolling through documents or web pages. While less common today due to the prevalence of optical and laser mice, scroll-balls can still be found in some specialized devices and ergonomic designs.