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The scrollbar command creates a new window (given by the pathName argument) and makes it into a scrollbar widget. Additional options, described above, may be specified on the command line or in the option database to configure aspects of the scrollbar such as its colors, orientation, and relief. The scrollbar command returns its pathName argument. At the time this command is invoked, there must not exist a window named pathName, but pathName's parent must exist.
A scrollbar is a widget that displays two arrows, one at each end of the scrollbar, and a slider in the middle portion of the scrollbar. A scrollbar is used to provide information about what is visible in an associated window that displays an object of some sort (such as a file being edited or a drawing). The position and size of the slider indicate which portion of the object is visible in the associated window. For example, if the slider in a vertical scrollbar covers the top third of the area between the two arrows, it means that the associated window displays the top third of its object.
Scrollbars can be used to adjust the view in the associated window by clicking or dragging with the mouse. See the BINDINGS section below for details.
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