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MCK-142 Pro: two sets of function keys: F1–F12 at the left side of the keyboard and additionally 24 user programmable PF keys located above QWERTY keys. [5] NEC PC-8000 Series (1979): five function keys at the top of the keyboard, along with a numeric keypad on the right-hand side of the keyboard. [3] [4]
Most keyboards have a row of keys at the top that are labeled F1 through F12. These are like built-in hotkeys, each with an assigned function, like pressing F9 to refresh your screen.
Ctrl+5 (numeric keypad) or Function+Ctrl+I (laptop) ≣ Menu: ≣ Menu or ⇧ Shift+F10: Toggle selected state of focused checkbox, radio button, or toggle button Space: Space: Space: Space: Activate focused button, menu item etc. ↵ Enter: Space (also ↵ Enter [notes 5] for menu items) ↵ Enter: ↵ Enter: Expand a drop-down list F4 or Alt+↓
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.
The F-Lock key on a Microsoft keyboard. The F-Lock key, introduced by Microsoft in 2001, [1] toggles the state of the function keys.When on, keys F1 to F12 behave as applicable, with meanings defined by the application being used at the time.
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Some laptops and compact keyboards also have a Function Lock - FN Lock. 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.
Full-sized desktop keyboards with a dedicated numpad have function keys that can range up to F15, F16, or F19. [5] F17-F19 keys were introduced with the aluminium USB keyboard. [6] The function keys on all compact Magic Keyboards and MacBooks range from F1-F12 only, just like IBM PC keyboards.