double-click

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 Tim Mott of Xerox Palo Alto Research Center. Often, single-clicking selects (or highlights) an object (e.g. the space between two characters) while a double-click selects the next object up in the selection hierarchy (e.g. a word), or executes the function associated with that object (e.g. open a file folder). Following a link in a modern 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.)

==On icons== On most systems, double-clicking an icon in the file manager will perform a default action on the object represented by the icon. Double-clicking an application program will launch the program, and double-clicking a file icon will open the file in a default application for that file's type or format.