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ToggleKeys (or Toggle Keys) is a feature of Microsoft Windows. It is an accessibility function which is designed for people who have vision impairment or cognitive disabilities . When ToggleKeys is turned on, the computer will provide sound cues when the locking keys ( ⇪ Caps Lock , Num Lock , or Scroll Lock ) are pressed.
Pressing the Scroll Lock key in the Linux console while the text is scrolling through the screen freezes the console output (but not input) during which no further text is sent to the screen, while the program continues running as usual, or become blocked at the write syscall when too much data prevented from reaching the terminal caused the tty's output queue to become full and the tty file ...
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.
It began to become less common on later USB-based keyboards as these machines keep the keyboard powered when the machine is sleeping, so any key can act as a power key. Power keys remain on some modern Macs, including the MacBook Air, but most others have replaced it with an "eject" key, formerly used to open the now-non-existent CD drive. [2]
Fn is a modifier key, and works like other modifiers keys, such as Ctrl, Shift, Alt and AltGr.For a standard modifier key, the microcontroller inside the keyboard sends a scancode for the modifier itself, which is then interpreted by the operating system and combined with other simultaneous key-presses.
Some non-English language keyboards have special keys to produce accented modifications of the standard Latin-letter keys. In fact, the standard British keyboard layout includes an accent key on the top-left corner to produce àèìòù, although this is a two step procedure, with the user pressing the accent key, releasing, then pressing the letter key.
On Wikipedia, access keys allow you to do a lot more—protect a page, show page history, publish your changes, show preview text, and so on. See the next section for the full list. Most web browsers require holding down one or two modifier keys to use an access key.
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).