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A '''slider''' or '''track bar''' is a [[graphical control element]] with which a user may set a value by moving an indicator.<ref>{{Cite journal |last=Eick |first=Stephen G. |date=1994-11-02 |title=Data visualization sliders |url=https://dl.acm.org/doi/abs/10.1145/192426.192472 |journal=Proceedings of the 7th annual ACM symposium on User interface software and technology |series=UIST '94 |___location=New York, NY, USA |publisher=Association for Computing Machinery |pages=119–120 |doi=10.1145/192426.192472 |isbn=978-0-89791-657-8 |quote=Sliders are a general-purpose user input mechanism enabling users to specify a single input value from a well-defined range. They are widely used in all graphical user-interface systems.... Sliders are easy to use, intuitive, and provide a sensitive mechanism for specifying values. Sliders have a threshold bar positioned within a scale that the user manipulates with a mouse to select a value. Graphical input tools with similar function include dials, bars, pointers, gauges, and potentiometers.}}</ref> In some cases the user may also click on a point on the slider to change the setting. It is different from a [[scrollbar]] in that it is not continuous but used to adjust a value without changing the format of the display or the other information on the screen.
Its most popular use is for viewing and jumping to a playback position in [[media player software]].{{citation needed|date=May 2025}}
== Usage with progress bars ==
Sliders are also combined with [[progress bar]]s in the playback of [[streaming media]] over a network connection (e.g., YouTube videos) in order to show the content buffering position versus the playback position.{{citation needed|date=May 2025}} This is done by superimposing a colored shaded area (progress bar) on top of the slider, indicating whether the user can "jump" forward or not.
== References ==
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