layout, the grave accent key () becomes, as it also does in the US International layout, a dead key modifying the character generated by the next key pressed. The apostrophe, double-quote, tilde and circumflex (caret) keys are not changed, becoming dead keys only when 'shifted' with . Additional precomposed characters are also obtained by shifting the 'normal' key using the key. The extended keyboard is software installed from the Windows control panel, and the extended characters are not normally engraved on keyboards. The UK Extended keyboard uses mostly the AltGr key to add diacritics to the letters a, e, i, n, o, u, w and y (the last two being used in Welsh) as appropriate for each character, as well as to their capitals. Pressing the key and then a character that does not take the specific diacritic produces the behaviour of a standard keyboard. The key presses followed by spacebar generate a stand-alone mark.: grave accents (e.g. à, è, etc.) needed for Scots Gaelic are generated by pressing the grave accent (or 'backtick') key , which is a dead key, then the letter. Thus produces à. acute accents (e.g. á) needed for Irish are generated by pressing the key together with the letter (or acting as a dead key combination followed by the letter). Thus produces á; produces Á. (Some programs use the combination of and a letter for other functions, in which case the method must be used to generate acute accents). the circumflex diacritic needed for Welsh may be added by , acting as a dead key combination, followed by the letter. Thus then produces â, then produces the letter ŵ. Some other languages commonly studied in the UK and Ireland are also supported to some extent: diaeresis or umlaut (e.g. ä, ë, ö, etc.) is generated by a dead key combination , then the letter. Thus produces ä. tilde (e.g. ã, ñ, õ, etc., as used in Spanish and Portuguese) is generated by dead key combination , then the letter. Thus produces ã. cedilla (e.g. ç) under c is generated by , and the capital letter (Ç) is produced by The and letter method used for acutes and cedillas does not work for applications which assign shortcut menu functions to these key combinations. These combinations are intended to be mnemonic and designed to be easy to remember: the circumflex accent (e.g. â) is similar to the