Altnäppäin

Altnäppäin, known in English as the Alt key, is a modifier key found on most computer keyboards. It is typically located to the left and right of the spacebar. The Alt key does not produce any character or symbol on its own. Instead, it is used in conjunction with other keys to perform various commands or shortcuts.

Pressing and holding the Alt key while pressing another key often triggers a specific function within the operating system or an application. For example, on Windows, Alt + Tab is commonly used to switch between open applications. Alt + F4 is used to close the active window. In many programs, Alt can be used to access menu bars, for instance, pressing Alt on its own might highlight the "File" menu.

On macOS, the equivalent key is the Option key, which has a similar function. In different software, the Alt key can be used for a wide range of shortcuts, such as creating special characters (often in combination with the numeric keypad), activating specific tools in graphics software, or navigating through menus. The exact functionality of the Alt key can vary depending on the operating system, the specific application being used, and keyboard layout. Its primary purpose is to extend the functionality of other keys, providing users with quicker access to commands and features.