Editing AltGr key (section)

=== United Kingdom and Ireland ===
{{broader|QWERTY#United Kingdom|QWERTY#Irish}}
[[File:KB United Kingdom.svg|600px|United Kingdom keyboard layout]]

{{Col-begin}}
{{Col-break|width=25%}}
* {{keypress|AltGr|A}} → <big>á and Á</big>
* {{keypress|AltGr|E}} → <big>é and É</big>
* {{keypress|AltGr|I}} → <big>í and Í</big>
* {{keypress|AltGr|O}} → <big>ó and Ó</big>
* {{keypress|AltGr|U}} → <big>ú and Ú</big>
{{Col-break}}
* {{keypress|AltGr|4}} → <big>€</big>
* {{keypress|AltGr|#}} → <big>\</big>
* {{keypress|AltGr|`/¬}} → <big>¦</big>
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In [[Keyboard layout#United Kingdom|UK]] and [[Keyboard layout#Irish|Ireland]] keyboard layouts, only two alternative use symbols are printed on most keyboards, which require the AltGr key to function. These are:
* '''€''' the [[euro sign]]. Located on the "4/$" key.
* '''¦''' the [[broken bar]] symbol.  Located on the "`/¬" key, to the immediate left of "1".

Using the AltGr key on [[Linux]] produces many other characters and  symbols, e.g. {{not a typo|¹²³€½{[]}@łe¶ŧ←↓→øþæßðđŋħjĸł«»¢“”nµΩŁE®Ŧ¥↑ıØÞÆ§ÐªŊĦJ&Ł<>©‘’Nº×÷·}} (If reconfigured as a [[compose key]], an even larger repertoire is available). 

With the UK extended keyboard setting ([[#UK extended keyboard layout|below]]), [[ChromeOS]] offers a [[QWERTY#Chrome OS|large repertoire]] of symbols and [[precomposed character]]s.

====Scotland and Wales====
For the diacritics used by [[Welsh (language)|Welsh]] (ŵ and ŷ) and [[Scottish Gaelic]] (à, è, ì, ò and ù), the UK extended keyboard setting is needed. This makes available {{keypress|AltGr|6}} (for circumflex accent) and {{keypress|AltGr|`}} (for grave accent) as dead keys.

====UK extended keyboard layout====
The [[QWERTY#United Kingdom (Extended) Layout|UK-Extended keyboard mapping]] (available with Microsoft Windows, Linux and ChromeOS) allows many characters with [[diacritical mark]]s (including those used in other European countries) to be generated by using the AltGr key, [[dead key]]s or a [[compose key]], in combination with others.

{| class="wikitable" style="text-align:center;"
|+ UK extended layout under ChromeOS
| ¬ {{green|◌}}<br>{{red|◌}} {{green|¦}}||! {{green|¡}}<br>1 {{green|¹}}||" {{green|½}}<br>2 {{green|◌}}||£ {{green|⅓}}<br>3 {{green|³}}||$ {{green|¼}}<br>4 {{green|€}}||% {{green|⅜}}<br>5 {{green|½}}||^ {{green|⅝}}<br>6 {{green|◌}}||& {{green|⅞}}<br>7 {{green|{}}||* {{green|™}}<br>8 {{green|[}}||( {{green|±}}<br>9 {{green|]}}||) {{green|°}}<br>0 {{green|}}<nowiki>}</nowiki>||_ {{green|¿}}<br>- {{green|\}}||+ {{green|◌}}<br>= {{green|◌}}
|-
|tab||Q {{green|Ω}}<br>q {{green|@}}||W {{green|Ẃ}}<br>w {{green|ẃ}}||E {{green|É}}<br>e {{green|é}}||R {{green|®}}<br>r {{green|¶}}||T {{green|Ŧ}}<br>t {{green|ŧ}}||Y {{green|Ý}}<br>y {{green|ý}}||U {{green|Ú}}<br>u {{green|ú}}||I {{green|Í}}<br>i {{green|í}}||O {{green|Ó}}<br>o {{green|ó}}||P {{green|Þ}}<br>p {{green|þ}}||{ {{green|◌}}<br>[ {{green|◌}}||} {{green|◌}}<br>] {{green|◌}}
|-
|◉||A {{green|Á}}<br>a {{green|á}}||S {{green|§}}<br>s {{green|ß}}||D {{green|Ð}}<br>d {{green|ð}}||F {{green|ª}}<br>f {{green|đ}}||G {{green|Ŋ}}<br>g {{green|ŋ}}||H {{green|Ħ}}<br>h {{green|ħ}}||J {{green|◌}}<br>j {{green|◌}}||K {{green|&}}<br>k {{green|ĸ}}||L {{green|Ł}}<br>l {{green|ł}}||: {{green|◌}}<br>; {{green|◌}}||@ {{green|◌}}<br>' {{green|◌}}||~ {{green|◌}}<br># {{green|◌}}
|-
|shift||<nowiki>|</nowiki> {{green|¦}}<br>\ {{green|<nowiki>|</nowiki>}}||Z {{green|<}}<br>z {{green|«}}||X {{green|>}}<br>x {{green|»}}||C {{green|Ç}}<br>c {{green|ç}}||V {{green|‘}}<br>v {{green|“}}||B {{green|’}}<br>b {{green|”}}||N {{green|N}}<br>n {{green|n}}||M {{green|º}}<br>m {{green|{{not a typo|µ}}}}||<nowiki><</nowiki> {{green|×}}<br>, {{green|─}}||<nowiki>></nowiki> {{green|÷}}<br>. {{green|·}}||? {{green|◌}}<br>/ {{green|◌}}||
|} 
Notes: Dotted circle (◌) is used here to indicate a dead key, invoked using AltGr. The {{keypress|`}} ([[grave accent]]) key is the only one that acts as a free-standing dead key and thus does not respond as shown on the key-cap. (For a complete list of the characters generated using dead keys, see [[QWERTY#Chrome OS|QWERTY#ChromeOS]].) <br />
{{keypress|AltGr|shift|0}} (°) is a [[degree sign]];  {{keypress|AltGr|shift|M}} (º) is a masculine [[ordinal indicator]]. {{keypress|AltGr|,}} is an [[em-dash]]; there is no provision for [[en-dash]].