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Key rollover is the ability of a computer keyboard to correctly handle several simultaneous keystrokes. A keyboard with n-key rollover (NKRO) can correctly detect input from each key on the keyboard at the same time, regardless of how many other keys are also being pressed. Keyboards that lack full rollover will register an incorrect keystroke ...
Pressing either Shift key when the screen is blank or the computer is asleep will wake the computer. [citation needed] On some keyboards, if both Shift keys are held down simultaneously only some letters can be typed. For example, on the Dell keyboard Model RT7D20 only 16 letters can be typed. This phenomenon is known as "masking" and is a ...
The keys have been dubbed previous page and next page, accordingly. The arrow keys and the scroll wheel can also be used to scroll a document, although usually by smaller incremental distances. Used together with a modifier key, such as Alt, ⌥ Opt, ^Ctrl or a combination thereof, they may act the same as the Page keys.
Mozilla Firefox 1.5 on Windows: hold Alt, press access key; Mozilla Firefox before version 14 on Mac OS X: hold Control, press access key; Safari 3 or earlier on Mac OS X: hold Control, press access key; Camino : hold Control, press access key; Opera 12 and lower: press and release ⇧ Shift+Esc, then press access key
Mac: The classic Mac OS supported system extensions known generally as FKEYS which could be installed in the System file and could be accessed with a Command-Shift-(number) keystroke combination (Command-Shift-3 was the screen capture function included with the system, and was installed as an FKEY); however, early Macintosh keyboards did not support numbered function keys in the normal sense.
The Fn key is a form of meta-modifier key, in that it causes the operating system to see altered scancodes when other keys on the keyboard are pressed. This allows the keyboard to directly emulate a full-sized keyboard, so the operating system can use standard keymaps designed for a full-sized keyboard. However, because the operating system has ...
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On these devices, a Fn modifier key is used to combine keys to save room and add non-standard functionality; a common use is merging the row with keys F1- F12 with keys that adjust settings such as display brightness, media volume and playback, and keyboard illumination. Fn Lock toggles the default output of these keys.