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F-Lock

Computer key

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The F-Lock key, introduced by Microsoft in 2001, 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. When off, new behaviour is used: F5 means "open", F10 means "spell" etc. In early models, the state reverted to off at each reboot or keyboard reset, but later models retained F-Lock state across reboots.

Other keyboard manufacturers (such as Logitech and Viewsonic) have also implemented the F-Lock onto their keyboards.

01Issues

The introduction of F-Lock was marked by criticism on several points. First, the behaviour was unintuitive: pressing a key such as F4 by default no longer had its normal meaning, so combinations such as Alt+F4 appeared not to work.

Secondly, the choice of secondary function assigned to each key appeared to be arbitrary: whereas F7 was the traditional key for spell-check (used notably by Microsoft itself in its Office products), F7 was assigned the function of "reply", and spell-check was assigned to F10. This caused strong criticism from some commentators.

Pressing F2 in Windows Explorer in attempt to rename a file would instead undo an earlier file operation, with potentially disastrous consequences if the actual effect went silently unnoticed.

Because of such concerns, a number of methods for disabling the F-Lock function appeared on the web.

Many Windows/PC users have found a workaround using Microsoft's Intellitype Pro software, which allows a user to assign keystrokes/macros to the function and accessory keys. For example, assigning a macro {Press F1} to the function key F1 renders the F-lock issue moot, since the OS will interpret the key press as F1 regardless of the F-lock state.

02Functions

The new behaviours assigned to the keys are as follows:

KeyNew behaviour
F2Undo
F3Redo
F4New
F5Open
F6Close
F7Reply
F8Forward
F9Send
F10Spell
F11Save
F12Print
Watch videos about F-LockExplainers and documentaries on YouTube (opens in a new tab)

Sources and credits

This article is adapted from the Wikipedia article F-Lock, written by its contributors and licensed under CC BY-SA 4.0. Fathomly has changed the layout, removed citation markers, navigation and maintenance notices, and adjusted punctuation. This adapted version is shared under the same license. For references, see the original article.

Images, from Wikimedia Commons:

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