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Mouse keys is a feature of some graphical user interfaces that uses the keyboard (especially numeric keypad) as a pointing device (usually replacing a mouse).Its roots lie in the earliest days of visual editors when line and column navigation was controlled with arrow keys.
The spinning pinwheel is a type of progress indicator and a variation of the mouse pointer used in Apple's macOS to indicate that an application is busy. [ 1 ] Officially, the macOS Human Interface Guidelines refer to it as the spinning wait cursor , [ 2 ] but it is also known by other names.
double-action: refers to an instrument on which each key or button produces a single note, [6] as does unisonoric (recently coined as the counterpart of bisonoric) [citation needed] reversal: on a single-action instrument, a button or key which produces a note available elsewhere on the keyboard, but obtained by using the opposite bellows direction
A virtuoso (from Italian virtuoso, Italian: [virˈtwoːzo] or Italian: [virtuˈoːso]; Late Latin virtuosus; Latin virtus; 'virtue', 'excellence' or 'skill') is an individual who possesses outstanding talent and technical ability in a particular art or field such as fine arts, music, singing, playing a musical instrument, or composition.
The diatonic button accordion is bisonoric, meaning when a button is pressed, the note sounded changes depending on whether the bellows are being expanded or contracted. [2] This is similar to the harmonica, where the note changes depending on whether the player is breathing in or out. [ 2 ]