some mice have a wheel in the middle. generally what is this wheel for
Scroll wheel It is used, as the name suggests, for scrolling. It can often also be used as a third mouse button by pressing on it. The wheel is often – but not always – engineered with detents to turn in discrete steps, rather than continuously as an analog axis, to allow the operator to more easily intuit how far they are scrolling.
Ferris wheel The original Ferris Wheel, sometimes also referred to as the Chicago Wheel,[8][9][10] was designed and constructed by George Washington Gale Ferris Jr..[11]