Editing AltGr key (section)

{{Short description|Modifier key on some computer keyboards}}
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[[File:AltGr - Lenovo.jpg|thumb|The AltGr key is the first key to the right of the space bar.]]
'''AltGr''' (also '''Alt Graph''') is a [[modifier key]] found on [[computer keyboard]]s. It is primarily used to type characters that are used less frequently in the language that the keyboard is designed for, such as foreign [[currency symbol]]s, [[List of typographical symbols and punctuation marks|typographic mark]]s and [[precomposed character|accented letters]].<ref>{{cite web|title=What is AltGr key?|date=10 January 2024 |url=https://www.atulhost.com/what-is-altgr-key}}</ref> 
The AltGr key is used to access a third and a fourth{{efn|when {{keypress|Shift}} is also pressed}} [[grapheme]] for most keys. Most are accented variants of the letters on the keys, but some are additional [[List of typographical symbols and punctuation marks|symbols and punctuation marks]]. For example, when the US-International [[keyboard mapping]] is active, the {{keypress|C}} key can be used to insert four different characters:
* {{keypress|C}} → c ([[lowercase]] — first level)
* {{keypress|[[shift key|Shift]]|C}} → C ([[uppercase]] — second level)
* {{keypress|AltGr|C}} → © ([[copyright sign]] — third level)
* {{keypress|AltGr|[[shift key|Shift]]|C}} → ¢ ([[cent sign]] — fourth level)

Some languages, such as [[Bengali language|Bengali]], use this key when the number of letters of their alphabet is too large for a standard keyboard. On [[keyboard layout]]s 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).<ref>{{cite web|last=Microsoft Support|title=How to use the United States-International keyboard layout in Windows 7, in Windows Vista, and in Windows XP|url=https://support.microsoft.com/en-us/help/306560/how-to-use-the-united-states-international-keyboard-layout-in-windows|publisher=Microsoft|access-date=30 May 2020}}</ref> In [[macOS]], the [[Option key]] has functions similar to the AltGr key.