Alt key - wikipedia Alt key This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. ( January 2008 ) The Alt key ( right ) on a Windows keyboard ISO keyboard symbol for `` Alternate '' For a list of keyboard shortcuts, see Table of keyboard shortcuts ⌥ Opt or Alt The Alt key ( pronounced / ˈɔːlt / or / ˈʌlt / ) 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. For example, simply pressing `` A '' will type the letter a, but if you hold down either Alt key while pressing A, the computer will perform an Alt + A function, which varies from program to program. The international standard ISO / IEC 9995 - 2 calls it Alternate key. The key is located on either side of the Space bar, but in non-US PC keyboard layouts, rather than a second Alt key, there is an ' Alt Gr ' key to the right of the space bar. Both placements are in accordance with ISO / IEC 9995 - 2. The standardized keyboard symbol for the Alt key ( which may be used when the usual Latin lettering `` Alt '' is not preferred for labelling the key ) is given in ISO / IEC 9995 - 7 as symbol 25, and in ISO 7000 `` Graphical symbols for use on equipment '' as symbol ISO - 7000 - 2105. This symbol is encoded in Unicode as U + 2387 alternative key symbol ( ⎇ ). The Alt key should not be confused with the Altmode key ( sometimes also labelled Alt ) on some Teletype and ASCII terminals, which is a synonym for the ASCII escape character. Contents 1 Evolution 2 Alt key combinations 3 Alt key for special characters 3.1 Windows 3.2 macOS 4 Alt key pressed alone 5 See also 6 References Evolution The Alt key has come to replace the Meta key of the old MIT keyboards. In their original function, both Alt and Meta would set the high bit of the signal generated by the key to 1 ( for example, A generates 01000001 while Alt + A generates 11000001 ). However, in modern software, due to the requirement of the high bit for internationalization, Alt no longer works in such a way. The Alt key on an Apple keyboard Since the 1990s Alt has been printed on the Option key on most Mac keyboards. Alt is used in non-Mac software, such as non-macOS Unix and Windows programs, but in macOS it is always referred as the Option key. The Option key 's behaviour in macOS differs slightly from that of the Windows Alt key ( it is used as a modifier rather than to access pull - down menus, for example ). Alt key combinations The Alt key is well known as part of the key combinations : Ctrl + Alt + Delete brings up a task manager in some operating systems, see Control - Alt - Delete. Alt + ⌘ Cmd + Esc ( rather ⌘ Cmd + ⌥ Opt + Esc in native parlance ) brings up the Force Quit window in Apple 's macOS, see Option key. Ctrl + Alt + ← Backspace usually causes the X display server to shut down or to restart, see Control - Alt - Backspace. Alt + F4 closes the current window ( or shuts down the computer if the desktop is in the foreground ) on most windowing systems. Alt + Tab ↹ switches between the currently opened windows on most windowing systems, see Alt - Tab. Alt + ↵ Enter allows for a new line when Enter does another command. Alt key for special characters Windows In Microsoft Windows, holding down the Alt key while typing in numbers ( often referred to as Alt codes ) on the numeric keypad allows the user to type special characters not normally available on the keyboard. For example, holding down Alt while typing 0225 ( Alt + 0 2 2 5 ) on the numeric keypad will result in á, the character at 225 in the codepage. These extended keyboard characters are useful for persons using foreign languages, mathematics, currency symbols, business use, etc. Some computers work the same if the Num Lock key is on. MacOS On a Macintosh, the Alt key is called the Option key. It is not used to enter numeric character codes. Instead, keyboard letters and numbers are used. The diagram below shows the special characters a US Mac keyboard will produce when the Option key is pressed. The highlighted orange keys show the accents available from the combination of the Alt key and the keyboard characters e i u ( on the top letters row ) and ` n ( on the bottom letters row ). The accent then can be applied to associated letters both lower and uppercase. The additional characters a Mac will produce are a combination of both the ⌥ Option key and the ⇧ Shift key pressed down together. With this combination pressed the keyboard will now produce a different set or an uppercase version of the previous set in some cases. Alt key pressed alone When a user presses the Alt key by itself on Microsoft Windows, that moves keyboard focus to the menubar of the application having keyboard focus, and the key is not delivered to the application. In that state, another press of the Alt key will be delivered to the application. On other platforms, for example Ubuntu, the Alt key pressed by itself may invoke another application and not be delivered to the application having keyboard focus. In Ubuntu, pressing the key opens the HUD, which is an input field that lets you do menu commands such as opening a file, or creating a new file. See also Control - Alt - Delete Modifier key Alt code Option key References Jump up ^ How to find symbols and characters on the Mac -- Record PC - via Archive.org Jump up ^ Unity / HUD - Ubuntu Wiki IBM PC keyboard ( Windows, US layout ) Esc F1 F2 F3 F4 F5 F6 F7 F8 F9 F10 F11 F12 PrtScn / SysRq Scroll Lock Pause / Break Insert Home PgUp Num Lock ∕ ∗ − Delete End PgDn 7 8 9 + 5 6 ↑ Enter ← ↓ → 0 Ins. Del Keyboard keys Dead keys Compose Modifier keys Control Shift Alt / Option ( Apple ) AltGr Meta Command ( Apple ) / Windows ( Microsoft ) Super Hyper Fn Lock keys Scroll lock Num lock Caps lock F - Lock Navigation keys Arrow keys Page Up / Page Down Home End Esc Menu Editing Enter / Return Carriage return Backspace Insert Delete Tab Space bar Numeric keypad Language input Contextual Function keys Print screen System request Break / Pause Misc. Power management keys ( Power, Sleep, Wake ) Any key Macro key Concepts Keyboard layout Keyboard shortcut Retrieved from `` https://en.wikipedia.org/w/index.php?title=Alt_key&oldid=773732383 '' Categories : Computer keys Hidden categories : Articles needing additional references from January 2008 All articles needing additional references Talk Contents About Wikipedia Català Čeština Dansk Deutsch Dolnoserbski Español Esperanto Euskara فارسی Français 한국어 Hornjoserbsce Italiano עברית Қазақша Nederlands 日本 語 Norsk Norsk nynorsk Polski Русский Suomi Svenska Tagalog Татарча / tatarça 中文 Edit links This page was last edited on 4 April 2017, at 01 : 56. About Wikipedia

Question: how to do alt codes on a mac
Answer: Option key