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Mouse chording is the capability of performing actions when multiple mouse buttons are held down, much like a chorded keyboard and similar to mouse gestures.. One common application of mouse chording, called rocker navigation, is found in Opera and in mouse gesture extensions for Mozilla Firefox.
At the same time, they are bothersome for some screen reader users because it interferes with the shortcuts of their screen reader. The best solution would be to have customizable keyboard shortcuts. The accessibility of keyboard shortcuts (access keys) is a complicated matter.
A Control key (marked "Ctrl") on a Windows keyboard next to one style of a Windows key, followed in turn by an Alt key The rarely used ISO keyboard symbol for "Control". In computing, a Control keyCtrl is a modifier key which, when pressed in conjunction with another key, performs a special operation (for example, Ctrl+C).
The precise words used for these assignments and their meaning can vary depending on the context. For example, Microsoft has generally used keyboard shortcuts for Windows [2] and Microsoft Office [3] since the transition to 64-bit for Windows 7.
In cases when the document is shorter than the full screen, Page Up and Page Down often have no visible effect at all. Operating systems differ as to whether the keys (pressed without modifier) simply move the view – e.g. in Mac OS X – or also the input caret – e.g. in Microsoft Windows.
For the first computing devices a screen was built to operate in only portrait or landscape mode, and changing between orientations was not possible. Typically a custom video controller board was needed to support the unusual screen orientation, and software often needed to be custom-written in order to support the tall, narrow screen layout.
Alt+Tab ↹ is the common name for a keyboard shortcut that has been in Microsoft Windows since Windows 1.0 (1985). This shortcut switches between application-level windows without using the mouse; hence it was named Task Switcher (Flip in Windows Vista).
Screen direction is the direction that actors or objects appear to be moving on the screen from the point of view of the camera or audience. A rule of film editing and film grammar is that movement from one edited shot to another must maintain the consistency of screen direction in order to avoid audience confusion.