ToggleKeys

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 (,, or ) are pressed. A high-pitched sound plays when the keys are switched on and a low-pitched sound plays when they are switched off.

History
Microsoft first introduced ToggleKeys with Windows 95. The feature is also used in later versions of Windows.

Enabling
ToggleKeys can be enabled by pressing and holding the key for 5 seconds. This feature can also be turned on and off via the Accessibility or Ease of Access icon found either in the Control Panel or from within the Settings app.