Editing Scrollbar (section)

== Usage ==

=== Thumb dragging ===
Dragging the thumb is historically the traditional way of manipulating a scrollbar. By moving the cursor over to the thumb on the screen and then pressing and holding, the thumb can be dragged. This is often done using either a [[trackpad]] or the left click button on a conventional mouse or touchpad. Moving the cursor while pressing down moves the scrollbar's thumb to see different sections of the page.<ref name="BatesPat">{{cite web|last1=Bates|first1=Cary Lee|last2=Day|first2=Paul Reuben|title=User interface component and method of navigating across a boundary coupled to a scroll bar display element|url=https://patents.google.com/patent/US5977972|website=Google Patents}}</ref> On applications native to [[OS X El Capitan|OS X 10.11]] (and some previous OS X versions), scrollbars do not show up on the user interface until the user uses another scrolling technique, such as the two-finger scroll or using the arrow keys. Therefore, the user must scroll using one of these methods first, and then move their cursor over to the thumb, wherever it appears.

On [[Microsoft Windows]], moving the mouse away too far from the thumb while dragging it will reset the scrolling position to prior.

=== Scroll wheel ===
A scroll wheel on a conventional mouse may also be used. Moving the wheel in a desired direction moves the content in the same direction.<ref>{{cite web|last1=Shu|first1=Andy|title=Scroll bar input device for mouse|url=https://patents.google.com/patent/US6188393|website=Google Patents}}</ref> Most mice contain scroll wheels that only scroll up and down, but some mice contain scroll wheels that allow the user to scroll in any direction (up, down, left or right), including diagonal directions. While scrolling up and down, the direction in which the page scrolls in response to the direction that the user scrolls the scroll wheel can differ depending on the computer's scrolling settings.

=== Arrow keys ===
The arrow buttons on the keyboard may be clicked to scroll up, down, left, or right on a page. This scrolling technique usually results in the screen scrolling very slowly in comparison to the other scrolling techniques. Clicking the arrow buttons would result in the page continuing to scroll until one of the scroll limits has been reached.

=== Clicking the trough ===
The trough above or below the thumb can be clicked in order to immediately jump to that point on the page, or page-by-page for multipage content.<ref name="BatesPat" /> After clicking the trough, scrolling automatically begins and then stop once the thumb has reached the position of the mouse pointer. This scrolling technique is faster than others and is best used when the user has to scroll through a lot of content at once, or when the user knows where exactly on a page they need to scroll to.

=== On-screen arrow buttons ===
Many applications, such as Microsoft Word and [[PowerPoint]], contain scrollbars with on screen directional arrows for purposes of scrolling. Clicking on the arrows scrolls a small amount of the content, often single lines, at a time, and pressing and holding on them with the cursor continuously scrolls over more area on the page until released.<ref name="BatesPat" />
Sometimes, both arrow buttons appear next to each other for quick, precise manipulation without having to drag the thumb or move the mouse great distances to the other arrow (this was offered as an option in [[Mac OS 8#Mac OS 8.5|Mac OS 8.5]]); one of them may also be duplicated so as to show at both ends of the bar, providing familiarity for those used to both separate and adjacent buttons.  These arrow buttons existed until [[Mac OS X Lion|Mac OS X 10.7]] where they were dropped in favor of trackpad gestures and scroll-wheel mice.<ref>[http://reviews.cnet.com/8301-13727_7-20126182-263/options-for-page-down-and-scrolling-in-os-x/ Workaround for Having No Scrollbar Arrows in Mac OS X Lion]</ref>

In [[BeOS]], the on-screen scrolling buttons for both directions appear on both ends of the scroll bar. In several [[Microsoft Office]] programs, the additional buttons {{button|1=<span style="display:inline-block;transform:rotate(90deg);">⏪</span>}} and {{button|1=<span style="display:inline-block;transform:rotate(90deg);">⏩</span>}} can be used for per-page navigation.<ref>{{cite web |title=Windows' Scrolling Behaviour |url=https://www.osnews.com/story/22601/windows-scrolling-behaviour-really-really-annoying/ |website=www.osnews.com |date=2009-12-10}}</ref>

=== Different mouse buttons ===
Another scrolling technique with scrollbars is to look at which mouse button was pressed. For instance, a left-click on the down arrow might cause the window to scroll down, while a right click in the same place would scroll up (e.g. [[RISC OS]]), or the middle button could be used to place the thumb precisely. This form requires less fine [[motor skills]], although it requires a multi-button mouse, and possibly a greater degree of GUI literacy.

=== Windows touchpad ===
Additionally, some [[Windows]]-enabled machines have a scrolling mechanism on the side of their touchpad, as shown in the picture. To use this mechanism, a finger is placed on the scroll area and moved up and down or left and right in order to scroll around the page. Again, depending on the computer's scrolling settings, moving the finger in certain directions along these scrolling areas could result in different corresponding scrolling directions.<ref>{{cite web|last1=Hoffman|first1=Chris|title=How To Use Windows 8's Gestures on a Laptop Trackpad|url=http://www.howtogeek.com/126084/how-to-use-windows-8s-gestures-on-a-laptop-trackpad/|website=How to Geek|publisher=How-To Geek LLC}}</ref>

=== Mac trackpad ===
A more modern scrolling technique is using the two-finger scroll on a Mac trackpad. In this technique, the tips of two fingers from the same hand are placed on the surface of the trackpad and moved accordingly. If the user has their trackpad scrolling direction set to "natural," moving their two fingers toward the top of the trackpad will cause the page to scroll up towards the top of the page; conversely, moving their fingers toward the bottom of the trackpad will cause the page to scroll down towards the bottom. If the user "flicks" their fingers by moving their two fingers very quickly across the trackpad and then releasing their fingers, the page will continue to scroll in the direction in which they flicked until it eventually slows down and stops, either because one of the scroll limits is reached or because the scroll speed slows down so much that it eventually simply stops. This feature is called inertia.