A double-click is the act of pressing a computer mouse button twice quickly without moving the mouse. Double-clicking allows two different actions to be associated with the same mouse button. It was developed by Bill Atkinson of Apple Computer (now Apple Inc.) for their Lisa project. Often, single-clicking selects (or highlights) an object, while a double-click executes the function associated with that object. Following a link in a web browser is accomplished with only a single click, requiring the use of a second mouse button, “click and hold” delay, or modifier key to gain access to actions other than following the link. On touchscreens, the double-click is called “double-tap”; it’s not used as much as double-click, but typically it functions as a zoom feature. (“triple-tap” sometimes used to zoom the whole screen.)
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