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Modifier key information


In computing, a modifier key is a special key (or combination) on a computer keyboard that temporarily modifies the normal action of another key when pressed together. By themselves, modifier keys usually do nothing; that is, pressing any of the ⇧ Shift, Alt, or Ctrl keys alone does not (generally) trigger any action from the computer.

For example, in most keyboard layouts the Shift key combination ⇧ Shift+A will produce a capital letter "A" instead of the default lower-case letter "a" (unless in Caps Lock or Shift lock mode). A combination of Alt+F4 in Microsoft Windows will close the active window; in this instance, Alt is the modifier key. In contrast, pressing just ⇧ Shift or Alt will probably do nothing unless assigned a specific function in a particular program (for example, activating input aids or the toolbar of the active window in Windows).

User interface expert Jef Raskin coined the term "quasimode" to describe the state a computer enters into when a modifier key is pressed.

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Modifier key

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computing, a modifier key is a special key (or combination) on a computer keyboard that temporarily modifies the normal action of another key when pressed...

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Fn key

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The Fn key, short form for function, is a modifier key on many keyboards, especially on laptops, used in a compact layout to combine keys which are normally...

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Command key

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The Command key (sometimes abbreviated as Cmd key), ⌘, formerly also known as the Apple key or open Apple key, is a modifier key present on Apple keyboards...

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Meta key

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Meta key is a modifier key on certain keyboards. It first appeared on the Stanford Artificial Intelligence Lab (SAIL) keyboard in 1970. The Meta key first...

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Keyboard layout

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a modifier key is held down while another key is struck. To facilitate this, modifier keys usually come in pairs, one functionally identical key for...

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Control key

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In computing, a Control key Ctrl is a modifier key which, when pressed in conjunction with another key, performs a special operation (for example, Ctrl+C)...

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Dead key

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A dead key is a special kind of modifier key on a mechanical typewriter, or computer keyboard, that is typically used to attach a specific diacritic to...

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Alt key

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function of other pressed keys. Thus, the Alt key is a modifier key, used in a similar fashion to the Shift key. For example, simply pressing A will type...

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AltGr key

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AltGr (also Alt Graph) is a modifier key found on many computer keyboards (rather than a second Alt key found on US keyboards). It is primarily used to...

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Compose key

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second-rightmost key on the bottom row. ISO keyboard symbol for "Compose Character" If the Compose key is not also a modifier key, then key rollover means...

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Option key

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The Option key, ⌥, is a modifier key present on Apple keyboards. It is located between the Control key and the Command key on a typical Mac keyboard....

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Key rollover

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using modifier keys such as Shift or Control, the user intentionally holds the modifier key(s) while pressing and releasing another key. Rapid typists...

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Computer keyboard

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themselves, modifier keys usually do nothing. The most widely used modifier keys include the Control key, Shift key and the Alt key. The AltGr key is used...

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Sticky keys

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pressing multiple keys at a time, allowing the user to press and release a modifier key, such as ⇧ Shift, Ctrl, Alt, or the Windows key, and have it remain...

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Modifier

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Compound modifier, two or more words that modify a noun Dangling modifier, a word or phrase that modifies a clause in an ambiguous manner Modifier key, a kind...

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Shift key

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key ⇧ Shift is a modifier key on a keyboard, used to type capital letters and other alternate "upper" characters. There are typically two shift keys,...

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Page Up and Page Down keys

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Used together with a modifier key, such as Alt, ⌥ Opt, ^Ctrl or a combination thereof, they may act the same as the Page keys. In most operating systems...

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Function key

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increased to 24 keys in two rows. IBM 5250: early models frequently had a "cmd" modifier key, by which the numeric row keys emulate function keys; later models...

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Keyboard shortcut

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holds down the modifier key(s), then quickly presses and releases the regular (non-modifier) key, and finally releases the modifier key(s). This distinction...

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Arrow keys

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was not used; the arrow keys controlled both movement ↑↓ as well as looking around ←→, with strafing done using modifier keys (usually Alt + ←→). However...

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Command button

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trigger an event Keyboard buttons (generally) The "command" key on Apple keyboards (a modifier key with a "⌘" symbol printed on it) Push-button This disambiguation...

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Access key

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In a web browser, an access key or accesskey allows a computer user to immediately jump to a specific web page via the keyboard. They were introduced...

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Lock key

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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...

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Editor war

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of Emacs, involved predicting what would happen if a user held down a modifier key (such as Ctrl or Alt) and typed their own name. This game humor originated...

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Space bar

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"chiclet" keys and small, offset space key). Depending on the operating system, the space bar used with a modifier key such as the control key may have...

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Emacs

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without modifier keys. Using customized key layout offered by Spacemacs and Doom Emacs, projects where space bar key is used as the main key for initiating...

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Typewriter

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page. The concept of a shift key or modifier key was later extended to Ctrl, Alt, AltGr and Super ("Windows" or "Apple") keys on modern computer keyboards...

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