Fn key
From Wikipedia, the free encyclopedia
- Fn key can also refer to the function keys on a computer keyboard.
Fn is a modifier key on PC keyboards used in a compact layout to combine keys which are usually kept separate. It is typically found on laptops, since a full sized keyboard would be difficult to fit in a laptop chassis.
[edit] Compact layouts
Typically, in a compact layout the main area of the keyboard (containing the letter keys) is kept in much the same layout as with a full-sized keyboard, and the numeric keypad is moved to share a group of central keys. This allows typists to enter text without having to learn a new layout. The symbol that is accessed through pressing Fn is often printed on the key in a smaller font or different colour.
This 78-key UK layout is taken from the Apple iBook. Characters in blue are accessed through the Fn key.
[edit] Technical details
Unlike other modifier keys such as Shift or AltGr, the control processor inside the keyboard typically sends out a different keycode depending on whether the Fn key is depressed. This allows the keyboard to emulate a full sized keyboard and means that specialised keymaps do not need to be created; the operating system can use standard keymaps designed for a full sized keyboard.
Computer Keyboard Keys
| Dead keys: | Compose |
|---|---|
| Modifier keys: | Control • Shift • Alt/Option (Apple) • AltGr • Command/Meta (MIT keyboards) • Windows • Fn (compact keyboards) |
| Lock keys: | Scroll lock • Num lock • Caps lock |
| Navigation: | Arrow • Page scrolling (Page up/Page down) • Home/End |
| Editing: | Return/Enter • Backspace • Insert • Delete • Tab • Space bar |
| Misc.: | SysRq/Print screen • Break/Pause • Escape • Menu • Numpad • Function • Power management (Power, Sleep, Wake) |
