Näppäinlukkotoiminnot

Näppäinlukkotoiminnot, often referred to as sticky keys or toggle keys, are accessibility features found on most computer operating systems. These functions modify the behavior of modifier keys such as Shift, Ctrl, Alt, and the Windows key. Instead of requiring a user to press and hold multiple keys simultaneously for shortcuts, these functions allow users to press modifier keys one at a time, and they will remain "locked" until the next key is pressed. This can significantly aid individuals who have difficulty performing simultaneous keystrokes due to physical limitations.

Sticky keys are the most common implementation, allowing users to press a modifier key, release it, and then press the desired character key. For example, to type a capital letter 'A', a user with sticky keys enabled could press Shift, release it, and then press 'a'. The operating system registers this as a capitalized letter. Similarly, complex keyboard shortcuts like Ctrl+Alt+Delete can be executed by pressing Ctrl, releasing it, then pressing Alt, releasing it, and finally pressing Delete.

Toggle keys, such as Caps Lock, Num Lock, and Scroll Lock, also behave differently when enabled. Instead of requiring a press and hold, a single press activates the function, and another press deactivates it. This prevents the need to continuously hold down these keys. These features are typically found within the operating system's accessibility or ease of access settings, allowing users to customize their behavior and activate them as needed.