free-standing circumflex (caret) (^), printed above the key; the diaeresis/umlaut (e.g. ö) is visually similar to the double-quote (") above on the UK keyboard; the tilde (~) is printed on the same key as the . The UK Extended layout is almost entirely transparent to users familiar with the UK layout. A machine with the extended layout behaves exactly as with the standard UK, except for the rarely used grave accent key. This makes this layout suitable for a machine for shared or public use by a user population in which some use the extended functions. Despite being created for multilingual users, UK-Extended in Windows does have some gaps — there are many languages that it cannot cope with, including Romanian and Turkish, and all languages with different character sets, such as Greek and Russian. It also does not cater for thorn (þ, Þ) in Old English, the ß in German, the œ in French, nor for the å, æ, ø, ð, þ in Nordic languages. ChromeOS The UK Extended layout (a ChromeOS extension) provides all the same combinations as with Windows, but adds many more symbols and dead keys via AltGr. Notes: Dotted circle (◌) is used here to indicate a dead key. The key is the only one that acts as a free-standing dead key and thus does not respond as shown on the key-cap. All others are invoked by AltGr. (°) is a degree sign; (º) is a masculine ordinal indicator Dead keys produces grave accents (e.g., ) ( produces a standalone grave sign). (release) produces diaeresis accents (e.g., ) (release) produces circumflex accents (e.g., ) (release) produces (mainly) comma diacritic or cedilla below the letter e.g., (release) produces a hook (diacritic) on vowels (e.g., ) AltGr+[ same as AltGr+2 AltGr+] same as AltGr+# (release) produces overrings (e.g., ) (release) produces macrons (e.g., ) (release) produces mainly horn (diacritic)s (e.g., ) (release) produces an adjacent horn (e.g., ) (release) produces acute accents (e.g., ) (release) produces double acute accents on some letters (e.g., ) that exist in Unicode as pre-composed characters (release) produces acute accents (e.g., ) (release) produces caron (haček) diacritics (e.g., ) (release) produces tilde diacritics (e.g., ) (release) produces inverted breve diacritics (e.g., ) (release) produces mainly underdots (e.g., ) (release) produces mainly overdots (e.g., ) Finally, any arbitrary Unicode glyph can be produced given its hexadecimal code point: , release, then the hex