scroll bar

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scroll bar

[′skrōl ‚bär]
(computer science)
A horizontal or vertical bar that contains a box that is clicked and dragged up, down, left, or right in order to scroll the screen.

scroll bar

(graphics)
A widget found in graphical user interfaces and used to show and control ("scroll") which portion of a document is currently visible in a window. A window may have a horizontal or, most often, vertical scroll bar or both.

A vertical scroll bar is a narrow strip drawn up the side of the window containing a "bubble" whose position in the scroll bar represents the position of the visible part within the whole document. By dragging the bubble with the mouse the user can scroll the view over the entire document. Arrow buttons are usually provided at the end(s) of the scroll bar to allow the window to be scrolled by a small amount, e.g. one line of text, in either direction by clicking them with the mouse. Some programs provide a second pair of buttons for scrolling a page at a time or some other unit. Clicking on the scroll bar outside the bubble will either, depending on the particular WIMP, move the bubble to that point or move it some amount (typically a screenful) in that direction.

Different WIMP systems define different standards for whether scroll bars appear on the left or right, top or bottom of the window, and for their behaviour.

To reduce mouse movement, the up and down scroll buttons should either be next to each other at one end of the scroll bar (as in NEXTSTEP) or should reverse their effect when clicked with the right-hand mouse button (as in the X Window System and RISC OS). The fraction of the scroll bar filled by the bubble should indicate the fraction of the document visible in the window.

scroll bar

A vertical bar on the right side of a window or a horizontal bar at the bottom of a window that is used to move the window contents up and down or left and right. The bar contains a "thumb", which looks like an elevator in a shaft. When dragged with the mouse, the window contents move correspondingly. When the bar is clicked above or below the thumb, the contents are moved a page at a time. The arrows are clicked to move one line at a time.

Becoming Somewhat Obsolete
Since the advent of scroll mice, which use a wheel for vertical and horizontal scrolling, the scroll bar is being used less and less on desktop applications. In addition, tablet and smartphone content is scrolled by fingers, and a scroll bar was never a natural part of the interface. See scroll mouse.


Scroll Bars
Clicking in the bar or dragging the thumb moves the contents within the window. The Mac example (right) shows an optional variation that places both scroll arrows in the same vicinity to lessen mouse movement when switching directions.
References in periodicals archive ?
Mavletova & Short questionnaires for mobile Questionnaire Couper (2014) devices (17 questions) with the Design respondent using the scrollbar leads to quicker completion, lower (albeit not significant) rates of interruption, fewer technical problems and attitudinal responses with greater variance, as well as greater respondent satisfaction with the process.
[62] showed a prototype that can use a power-up button to operate functions, such as clicking, selecting a combo box, and scrolling a scrollbar. Even though the preliminary experiment yielded promising results, the prototype required the installation of additional sensors: proximity sensor, and pressure sensor [62].
"They may also see scrollbar rendering issues," he noted, then urged them to upgrade to Firefox 5.
Dubai How many times has the mere sight of an internet text with a scrollbar caused you to abandon it altogether for a shorter passage?
Moreover, we tried to form a natural sentence "Search all parcels for the following attributes" and then for each attribute a scrollbar.
It has a colour scrollbar at the bottom and works with the Barnes & Noble ebook store.
In both treatments, they selected their effort ("decision number") by means of a scrollbar. This being done, they had to click a button to generate their "personal random number" that was added to their effort choice to constitute their individual outcome ('result").
The scrollbar is difficult to navigate without pristine fingernails and seems backwards in some places, requiring the user to scroll up to move down on a Web page or task menu and vice versa.
Slide down the scrollbar to the area labeled ActiveX controls and plug-ins and click on Disable for all 10 options.
Mouse interaction can be subdivided into categories such as menu-driven (choosing an item from a pull-down or pop-up menu), scroll-driven (clicking or dragging a scrollbar), or direct manipulation (clicking directly on an object to change its state or behavior) (Shneiderman, 1998).
Another commonly mentioned disadvantage of the e-book was the decreased ergonomics in accessing a particular location: flipping pages is much easier than moving a scrollbar with a stylus.
The scroll feature on the handheld's small screen is essentially a miniaturized version of a PG scrollbar and is somewhat cumbersome because of its size.