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On IBM PC compatible personal computers from the 1980s, the BIOS allowed the user to hold down the Alt key and type a decimal number on the keypad. It would place the corresponding code into the keyboard buffer so that it would look (almost) as if the code had been entered by a single keystroke.
The alt keys (there are two of them) are easy to find on any Windows device—there’s one on either side of the space bar. It’s easy to make any accent or symbol on a Windows keyboard once you ...
The Alt key on a Lenovo laptop keyboard ISO keyboard symbol for “Alternate” The Alt keyAlt (pronounced / ɔː l t / AWLT or / ʌ l t / ULT) on a computer keyboard is used to change (alternate) the function of other pressed keys. Thus, the Alt key is a modifier key, used in a similar fashion to the Shift key.
Under Windows, the Alt key is pressed and held down while a decimal character code is entered on the numeric keypad; the Alt key is then released and the character appears. The numerical code corresponds to the character’s code point in the Windows 1252 code page , with a leading zero; for example, an en dash (–) is entered using Alt + 0150 .
On keyboard layouts that do not include an AltGr key, such as US keyboards, the key position is labelled as a right-hand Alt key. When a relevant keyboard mapping is chosen in the operating system, this key will function separately as AltGr (despite being marked identically to the left-hand Alt key). [2]
Varies with laptop / extended keyboard type; enable Mouse keys in Universal Access, then Fn+Ctrl+5 or 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
Many computer systems support alternative keys or key sequences for keyboards without the Han/Yeong key. It is absent from the keyboards of most portable computers in South Korea, where the right Alt key is used instead. On the right Alt key of these devices, only "한/영" (Han/Yeong) or both "한/영" (Han/Yeong) and Alt are printed.
Many keyboards do not label AltGr as such, leaving the Alt marking as in the US layout – the right Alt key nevertheless functions as AltGr in this layout, causing possible confusion when keyboard shortcuts with the Alt key are required (these usually work only with the left Alt) and causing the key to be commonly referred to as right Alt ...