![]() Laptop computers often include a touchpad programmed with a pointing device gesture that mimics a scroll-wheel (either by dedicating an edge of the pad for scrolling, or activating scrolling through a multitouch gesture), or mimics a scroll-wheel button click (by clicking both the left and right buttons simultaneously, to activate omni-directional scrolling). Instead of a scroll-wheel, some mice (and other devices) use an alternative but similar component. They have also appeared on keyboards, particularly on Logitech and Microsoft models, usually located to the left of the caps lock key. ![]() Scroll wheels can also be found on PDAs and mobiles phones such as early Sony models, BlackBerry devices and Nokia 7110, which usually have the function of navigating through menus. It had been based on ideas developed by Eric Michelman since 1993 with input from Chris Graham. The scroll wheel was popularized by the Microsoft IntelliMouse in 1996 along with support for the mouse wheel in Microsoft Office 97. It was named Genius EasyScroll and was also available as Mouse Systems ProAgio. In 1995, the Taiwanese company KYE Systems released the first commercial mouse with scroll wheel. In her patent application from 1992 there are two vertical wheels: left and right of the button(s). Īt the ACM SIGCHI conference in 1989, Gina Danielle Venolia from Apple presented a mouse prototype with a horizontal thumb-wheel for scrolling, or for navigating inwards and outwards: zooming or along the third axis in 3D space. It had a thumb-operated combined analog button/ toggle switch on the side for smooth scrolling. The earliest known example of the former is the Mighty Mouse prototype developed jointly by NTT, Japan and ETH Zürich, Switzerland (Kunio Ōno, Ken'ichi Fukaya and Jürg Nievergelt) in 1985. Other scrolling controls on a mouse, and the use of a wheel for scrolling both precede the combination of wheel and mouse. The scroll wheel on a mouse has been invented multiple times by different people unaware of the others' work. Some user interfaces, like Cinnamon (desktop environment), allow using it to adjust brightness and volume by pointing at the respective taskbar icon while scrolling. However, non-wheeled mice are still available. Scroll wheels are prevalent on modern computer mice and have become an integral part of the hardware interface. 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. Some mice's scroll wheels can scroll horizontally by tilting them to the left or right, or there may be additional wheel on a perpendicular axis located elsewhere on the mouse. On most mice, the scroll wheel can often also be used as a third, middle mouse button by pressing down on it, known as the scroll button. In other configurations (sometimes called "natural scrolling") the effect is inverted. ![]() In a graphical user interface, the "upward" motion moves contents of the window downward (and the scrollbar thumb, if present, upward), and vice versa. rolling the wheel from the top side to the bottom, is known as scrolling "downward" or "backward". ![]() ![]() The scroll wheel is placed horizontally between the mouse buttons and commonly uses vertical scrolling, wherein rolling the wheel from the bottom side to the top is known as scrolling "upward" or "forward", while the reverse, i.e. Sometimes the wheel can be pressed left and right, which is actually just two additional macros buttons. It is usually located between the left and right mouse buttons and is positioned perpendicular to the mouse surface. It is often made of hard plastic with a rubbery surface, centred around an internal rotary encoder. The term usually refers to such wheels found on computer mice (where they can also be called a mouse wheel). A scroll wheel is a wheel used for scrolling. ![]()
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