Linux keyboard text symbols: Compose key shortcuts

You use Linux and you often need to type accented letters, like ü? Or, maybe, ½, ±, €, ©, «»?

Yes, or no, there's also about a hundred other characters available for easy texting. And if you're a Linux user you at least have to know that you can input them from your keyboard with Compose key technique. Because, the spectre of symbols you can type with Compose key is huge and easiness of it's use is incredible. I mean practically all the lingual, technical, economical text characters and signs and the easiness of pressing three buttons.

The only bad thing about Compose key is that you can't type the cool stuff, like ♥ hearts, ★ stars, ♪ music notes and other cute symbols you can find in my Cool text Symbols for Facebook ϡ . You'll have to use Linux keyboard: Unicode hex codes composition to make that ones with your keyboard.

How it works

You press the key you chose as the Compose key then release the key, enter sequence of characters (2-3 keys) for a symbol you want to enter. For example , lets say you chose Alt as your Compose key. You press Alt, release it, you enter "mu", and you get µ symbol added into your text field. Simple, nah?

Choose your Compose key

To make this method available, first you have to choose your Compose key position. You can type special sequences to get symbols while this key is pressed, or turned on.

On GNOME

I hope it goes like this:

Get into System ➣ Preferences ➣ Keyboard ➣ Layouts .
Open Layout Options .
Expand Compose key position menu. Here you can choose the preferred button that will turn on the composition mode.

Reference

Ubuntu: Compose Key on help.Ubuntu.com.

On KDE

KDE 4.x

In KMenu start the System Settings .
Choose Regional & Language .
Keyboard Layout configuration.
Under the Layout tab, select Enable keyboard layouts .
In Advanced choose preferred Compose key position .

KDE 3.x

Start the System Settings or the KDE Control Center .
- If in System Settings ➣ Regional & Language .
- If in KDE Control Center ➣ Keyboard Layout .
Choose your keyboard layout.
In Xkb Options choose preferred Compose key position .

GTK programs, Console

GTK (such as Firefox , Gimp) and Gnome applications usually use SCIM as the input method, not XIM (X Input Method) that relies on the configurations from (X)Compose. If you have problems with that, or you want to make Composition key available for console - read userbase.KDE.org reference that I listed below.

References

KDE Compose Key on userbase.KDE.org. Visit it for more detailed information and if you experience some issues.
Compose key "magic" - really good article.

Best button for Compose key

Probably, the best position for Compose key is Left Windows key. Of course, this depends on how often you use text symbols, how good you are with your fingers and keyboard, your keyboard layout, on what you are used to, bla-bla-bla. But I think it's the fastest and easiest choice.

Shortcuts

Note, that different systems come with different tables. The one given below is just one of a kind. It may not completely match yours. Read more detailed information about Compose key sequences to find out how to find, or change your system's compose key sequences.

Diacritics and punctuation

Symbol	First key	Second key	Third key	Unicode code	Character name
´	apostrophe	apostrophe		00B4	Acute accent
'	apostrophe	space		0027	Apostrophe
'	space	apostrophe		0027	Apostrophe
˘	parenleft	space		02D8	Breve
˘	space	parenleft		02D8	Breve
ˇ	less	space		02C7	Caron
ˇ	space	less		02C7	Caron
¸	comma	comma		00B8	Cedilla
^	asciicircum	space		005E	Circumflex accent
^	greater	space		005E	Circumflex accent
^	space	asciicircum		005E	Circumflex accent
^	space	greater		005E	Circumflex accent
¨	quotedbl	quotedbl		00A8	Diaeresis
˙	period	period		02D9	dot above
`	grave	space		0060	Grave accent
`	space	grave		0060	Grave accent
—	minus	minus	minus	2014	em dash —
–	minus	minus	period	2013	en dash –
¡	exclam	exclam		00A1	inverted exclamation mark
¿	question	question		00BF	inverted question mark
{	minus	parenleft		007B	left Curly Bracket
{	parenleft	minus		007B	left Curly Bracket
‘	apostrophe	less		2018	left single Quotation Mark
‘	less	apostrophe		2018	left single Quotation Mark
[	parenleft	parenleft		005B	left Square Bracket
«	less	less		00AB	left pointing Double Angle Quotation Mark
¯	asciicircum	underscore		00AF	Macron
¯	asciicircum	minus		00AF	Macron
¯	minus	asciicircum		00AF	Macron
¯	underscore	asciicircum		00AF	Macron
¯	underscore	underscore		00AF	Macron
	space	space		00A0	Non-breaking Space
}	minus	parenright		007D	right Curly Bracket
}	parenright	minus		007D	right Curly Bracket
’	apostrophe	greater		2019	right single Quotation Mark
‘	greater	apostrophe		2019	right single Quotation Mark
]	parenright	parenright		005D	right Square Bracket
»	greater	greater		00BB	right pointing Double Angle Quotation Mark
	minus	minus	space	00AD	Soft-Hyphen (word break)

Currency

Symbol	First key	Second key	Unicode code	Character name
¢	bar	C	00A2	Cent sign
¢	bar	c	00A2	Cent sign
¢	C	slash	00A2	Cent sign
¢	c	bar	00A2	Cent sign
¢	c	slash	00A2	Cent sign
¢	C	bar	00A2	Cent sign
¢	slash	C	00A2	Cent sign
¢	slash	c	00A2	Cent sign
¤	0	X	00A4	Currency sign
¤	0	x	00A4	Currency sign
¤	O	X	00A4	Currency sign
¤	o	x	00A4	Currency sign
¤	O	x	00A4	Currency sign
¤	o	X	00A4	Currency sign
¤	X	O	00A4	Currency sign
¤	X	0	00A4	Currency sign
¤	x	o	00A4	Currency sign
¤	X	o	00A4	Currency sign
¤	x	0	00A4	Currency sign
¤	x	O	00A4	Currency sign
€	C	equal	20AC	Euro sign
€	c	equal	20AC	Euro sign
€	E	equal	20AC	Euro sign
€	e	equal	20AC	Euro sign
€	equal	C	20AC	Euro sign
€	equal	c	20AC	Euro sign
€	equal	E	20AC	Euro sign
€	equal	e	20AC	Euro sign
£	equal	l	00A3	Pound sign
£	equal	L	00A3	Pound sign
£	l	minus	00A3	Pound sign
£	L	minus	00A3	Pound sign
£	L	equal	00A3	Pound sign
£	l	equal	00A3	Pound sign
£	minus	L	00A3	Pound sign
£	minus	l	00A3	Pound sign
¥	equal	Y	00A5	Yen sign
¥	equal	y	00A5	Yen sign
¥	minus	Y	00A5	Yen sign
¥	minus	y	00A5	Yen sign
¥	y	equal	00A5	Yen sign
¥	Y	minus	00A5	Yen sign
¥	y	minus	00A5	Yen sign
¥	Y	equal	00A5	Yen sign

Vulgar Fractions

Symbol	First key	Second key	Unicode code	Character name
½	1	2	00BD	One-half
⅓	1	3	2153	One-third
⅔	2	3	2154	Two-thirds
¼	1	4	00BC	One-quarter
¾	3	4	00BE	Three-quarters
⅕	1	5	2155	One-fifth
⅖	2	5	2156	Two-fifths
⅗	3	5	2157	Three-fifths
⅘	4	5	2158	Four-fifths
⅙	1	6	2159	One-sixth
⅛	1	8	215B	One-eighth
⅜	3	8	215C	Three-eighths
⅝	5	8	215D	Five-eighths
⅞	7	8	215E	Seven-eighths

Note: Unicode is inconsistent. The codes for 1/2, 1/4 and 3/4 are in the Latin-1 block, codes for thirds, fifths, sixths, and eighths are in the Number Forms block (U+2150 to U+2189). Not all fonts support fractions.

Mathematical Symbols and Signs

Symbol	First key	Second key	Unicode code	Character name
©	0	C	00A9	Copyright sign
©	0	c	00A9	Copyright sign
©	O	C	00A9	Copyright sign
©	O	c	00A9	Copyright sign
©	o	C	00A9	Copyright sign
©	o	c	00A9	Copyright sign
©	C	0	00A9	Copyright sign
©	C	O	00A9	Copyright sign
©	C	o	00A9	Copyright sign
©	c	0	00A9	Copyright sign
©	c	O	00A9	Copyright sign
©	c	o	00A9	Copyright sign
©	parenleft	c	00A9	Copyright sign
°	0	asterisk	00B0	Degree sign
°	0	asciicircum	00B0	Degree sign
°	asciicircum	0	00B0	Degree sign
°	asterisk	0	00B0	Degree sign
÷	colon	minus	00F7	Division sign
÷	minus	colon	00F7	Division sign
ª	a	underscore	00AA	feminine ordinal indicator
ª	A	underscore	00AA	feminine ordinal indicator
ª	underscore	a	00AA	feminine ordinal indicator
ª	underscore	A	00AA	feminine ordinal indicator
º	o	underscore	00BA	masculine ordinal indicator
º	O	underscore	00BA	masculine ordinal indicator
º	underscore	o	00BA	masculine ordinal indicator
º	underscore	O	00BA	masculine ordinal indicator
µ	slash	U	00B5	Micro sign
µ	slash	u	00B5	Micro sign
µ	u	slash	00B5	Micro sign
µ	U	slash	00B5	Micro sign
·	asciicircum	period	00B7	Middle·Dot
·	period	asciicircum	00B7	Middle·Dot
×	x	x	00D7	Multiplication sign
¬	comma	minus	00AC	Not sign
¬	minus	comma	00AC	Not sign
#	plus	plus	0023	Number sign (Octothorpe)
¶	exclam	P	00B6	Pilcrow sign
¶	exclam	p	00B6	Pilcrow sign
¶	p	exclam	00B6	Pilcrow sign
¶	P	exclam	00B6	Pilcrow sign
±	minus	plus	00B1	plusminus sign
±	plus	minus	00B1	plusminus sign
®	O	R	00AE	Registered sign
®	O	r	00AE	Registered sign
®	o	R	00AE	Registered sign
®	o	r	00AE	Registered sign
®	parenleft	r	00AE	Registered sign
™	T	M	2122	Trademark sign
™	T	m	2122	Trademark sign
™	t	M	2122	Trademark sign
™	t	m	2122	Trademark sign
\	less	slash	005C	reverse Solidus
\	slash	slash	005C	reverse Solidus
\	slash	less	005C	reverse Solidus
§	0	s	00A7	Section sign
§	0	S	00A7	Section sign
§	exclam	s	00A7	Section sign
§	exclam	S	00A7	Section sign
§	o	s	00A7	Section sign
§	O	S	00A7	Section sign
§	S	0	00A7	Section sign
§	S	exclam	00A7	Section sign
§	s	0	00A7	Section sign
§	s	o	00A7	Section sign
§	S	O	00A7	Section sign
§	s	exclam	00A7	Section sign
¹	1	asciicircum	00B9	Superscript One
¹	1	s	00B9	Superscript One
¹	1	S	00B9	Superscript One
¹	asciicircum	1	00B9	Superscript One
¹	s	1	00B9	Superscript One
¹	S	1	00B9	Superscript One
²	2	S	00B2	Superscript Two
²	2	s	00B2	Superscript Two
²	2	asciicircum	00B2	Superscript Two
²	asciicircum	2	00B2	Superscript Two
²	s	2	00B2	Superscript Two
²	S	2	00B2	Superscript Two
³	3	asciicircum	00B3	Superscript Three
³	3	S	00B3	Superscript Three
³	3	s	00B3	Superscript Three
³	asciicircum	3	00B3	Superscript Three
³	S	3	00B3	Superscript Three
³	s	3	00B3	Superscript Three
~	asciiTilde (~)	space	007E	Tilde
~	minus	space	007E	Tilde
~	space	minus	007E	Tilde
~	space	asciiTilde	007E	Tilde
\|	asciicircum	slash	007C	vertical line
\|	l	v	007C	vertical line
\|	L	V	007C	vertical line
\|	slash	asciicircum	007C	vertical line
\|	v	l	007C	vertical line
\|	V	L	007C	vertical line

Greek

Symbol	First key	Second key	Third key	Unicode code	Character name
΅	apostrophe	quotedbl	space	0385	dialytika tonos
΅	quotedbl	apostrophe	space	0385	dialytika tonos
Ά	apostrophe	Greek Alpha		0386	capital Alpha with tonos
Ά	Greek Alpha	apostrophe		0386	capital Alpha with tonos
Έ	apostrophe	Greek Epsilon		0388	capital Epsilon with tonos
Έ	Greek Epsilon	apostrophe		0388	capital Epsilon with tonos
Ή	apostrophe	Greek Eta		0389	capital Eta with tonos
Ή	Greek Eta	apostrophe		0389	capital Eta with tonos
Ϊ	Greek Iota	quotedbl		03AA	capital Iota with dialytika
Ϊ	quotedbl	Greek Iota		03AA	capital Iota with dialytika
Ί	apostrophe	Greek Iota		038A	capital Iota with tonos
Ί	Greek Iota	apostrophe		038A	capital Iota with tonos
Ό	apostrophe	Greek Omicron		038C	capital Omicron with tonos
Ό	Greek Omicron	apostrophe		038C	capital Omicron with tonos
Ϋ	Greek Upsilon	quotedbl		03AB	capital Upsilon with dialytika
Ϋ	quotedbl	Greek Upsilon		03AB	capital Upsilon with dialytika
Ύ	apostrophe	Greek Upsilon		038E	capital Upsilon with tonos
Ύ	Greek Upsilon	apostrophe		038E	capital Upsilon with tonos
Ώ	apostrophe	Greek Omega		038F	capital Omega with tonos
Ώ	Greek Omega	apostrophe		038F	capital Omega with tonos
ά	apostrophe	Greek Alpha		03AC	small Alpha with tonos
ά	Greek Alpha	apostrophe		03AC	small Alpha with tonos
έ	apostrophe	Greek Epsilon		03AD	small Epsilon with tonos
έ	Greek Epsilon	apostrophe		03AD	small Epsilon with tonos
ή	apostrophe	Greek eta		03AE	small Eta with tonos
ή	Greek eta	apostrophe		03AE	small Eta with tonos
ΐ	apostrophe	quotedbl	Greek iota	0390	small Iota with dialytika and tonos
ΐ	quotedbl	apostrophe	Greek iota	0390	small Iota with dialytika and tonos
ϊ	Greek iota	quotedbl		03CA	small Iota with dialytika
ϊ	quotedbl	Greek iota		03CA	small Iota with dialytika
ί	apostrophe	Greek iota		03AF	small Iota with tonos
ί	Greek iota	apostrophe		03AF	small Iota with tonos
ό	apostrophe	Greek oMicron		03CC	small Omicron with tonos
ό	Greek Omicron	apostrophe		03CC	small Omicron with tonos
ΰ	apostrophe	quotedbl	Greek upsilon	03B0	small Upsilon with dialytika and tonos
ΰ	quotedbl	apostrophe	Greek upsilon	03B0	small Upsilon with dialytika and tonos
ϋ	Greek upsilon	quotedbl		03CB	small Upsilon with dialytika
ϋ	quotedbl	Greek upsilon		03CB	small Upsilon with dialytika
ύ	apostrophe	Greek upsilon		03CD	small Upsilon with tonos
ύ	Greek upsilon	apostrophe		03CD	small Upsilon with tonos
ώ	apostrophe	Greek omega		03CE	small Omega with tonos
ώ	Greek omega	apostrophe		03CE	small Omega with tonos

Latin majuscules

Symbol	First key	Second key	Unicode code	Character name
á	a	apostrophe	00E1	small A with acute
á	a	acute	00E1	small A with acute
á	acute	a	00E1	small A with acute
á	apostrophe	a	00E1	small A with acute
ă	a	parenleft	0103	small A with breve
ă	parenleft	a	0103	small A with breve
â	a	greater	00E2	small A with circumflex
â	a	asciicircum	00E2	small A with circumflex
â	asciicircum	a	00E2	small A with circumflex
â	greater	a	00E2	small A with circumflex
ä	a	diaeresis	00E4	small A with diaeresis
ä	a	quotedbl	00E4	small A with diaeresis
ä	diaeresis	a	00E4	small A with diaeresis
ä	quotedbl	a	00E4	small A with diaeresis
à	a	grave	00E0	small A with grave
à	grave	a	00E0	small A with grave
ą	a	comma	0105	small A with ogonek
ą	comma	a	0105	small A with ogonek
å	a	asterisk	00E5	small A with ring above
å	a	a	00E5	small A with ring above
å	asterisk	a	00E5	small A with ring above
ã	a	asciiTilde	00E3	small A with tilde
ã	a	minus	00E3	small A with tilde
ã	asciiTilde	a	00E3	small A with tilde
ã	minus	a	00E3	small A with tilde
æ	a	e	00E6	small AE
ḃ	b	period	1E03	small B with dot above
ḃ	period	b	1E03	small B with dot above
ć	apostrophe	c	0107	small C with acute
ć	c	apostrophe	0107	small C with acute
č	c	less	010D	small C with caron
č	less	c	010D	small C with caron
ç	c	comma	00E7	small C with cedilla
ç	comma	c	00E7	small C with cedilla
ċ	c	period	010B	small C with dot above
ċ	period	c	010B	small C with dot above
ď	d	less	010F	small D with caron
ď	less	d	010F	small D with caron
ḋ	d	period	1E0B	small D with dot above
ḋ	period	d	1E0B	small D with dot above
ð	d	h	00F0	small Eth
đ	d	minus	0111	small D with stroke
đ	minus	d	0111	small D with stroke
ı	i	period	0131	small dotless I
ı	period	i	0131	small dotless I
é	acute	e	00E9	small E with acute
é	apostrophe	e	00E9	small E with acute
é	e	acute	00E9	small E with acute
é	e	apostrophe	00E9	small E with acute
ě	e	less	011B	small E with caron
ě	less	e	011B	small E with caron
ê	asciicircum	e	00EA	small E with circumflex
ê	e	greater	00EA	small E with circumflex
ê	e	asciicircum	00EA	small E with circumflex
ê	greater	e	00EA	small E with circumflex
ë	diaeresis	e	00EB	small E with diaeresis
ë	e	diaeresis	00EB	small E with diaeresis
ë	e	quotedbl	00EB	small E with diaeresis
ë	quotedbl	e	00EB	small E with diaeresis
ė	e	period	0117	small E with dot above
ė	period	e	0117	small E with dot above
è	e	grave	00E8	small E with grave
è	grave	e	00E8	small E with grave
ē	e	underscore	0113	small E with macron
ē	e	minus	0113	small E with macron
ē	minus	e	0113	small E with macron
ē	underscore	e	0113	small E with macron
ę	comma	e	0119	small E with ogonek
ę	e	comma	0119	small E with ogonek
ŋ	n	g	014B	small ENG
ḟ	f	period	1E1F	small F with dot above
ḟ	period	f	1E1F	small F with dot above
ğ	breve	g	011F	small G with breve
ğ	g	breve	011F	small G with breve
ğ	g	parenleft	011F	small G with breve
ğ	g	U	011F	small G with breve
ğ	parenleft	g	011F	small G with breve
ģ	comma	g	0123	small G with cedilla
ģ	g	comma	0123	small G with cedilla
ġ	g	period	0121	small G with dot above
ġ	period	g	0121	small G with dot above
í	acute	i	00ED	small I with acute
í	apostrophe	i	00ED	small I with acute
í	i	acute	00ED	small I with acute
í	i	apostrophe	00ED	small I with acute
î	asciicircum	i	00EE	small I with circumflex
î	greater	i	00EE	small I with circumflex
î	i	greater	00EE	small I with circumflex
î	i	asciicircum	00EE	small I with circumflex
ï	diaeresis	i	00EF	small I with diaeresis
ï	i	quotedbl	00EF	small I with diaeresis
ï	i	diaeresis	00EF	small I with diaeresis
ï	quotedbl	i	00EF	small I with diaeresis
ì	grave	i	00EC	small I with grave
ì	i	grave	00EC	small I with grave
ī	i	minus	012B	small I with macron
ī	i	underscore	012B	small I with macron
ī	minus	i	012B	small I with macron
ī	underscore	i	012B	small I with macron
į	comma	i	012F	small I with ogonek
į	i	comma	012F	small I with ogonek
ĩ	asciiTilde	i	0129	small I with tilde
ĩ	i	asciiTilde	0129	small I with tilde
ķ	comma	k	0137	small K with cedilla
ķ	k	comma	0137	small K with cedilla
ĸ	k	k	0138	small KRA
ĺ	apostrophe	l	013A	small L with acute
ĺ	l	apostrophe	013A	small L with acute
ľ	l	less	013E	small L with caron
ľ	less	l	013E	small L with caron
ļ	comma	l	013C	small L with cedilla
ļ	l	comma	013C	small L with cedilla
ł	l	slash	0142	small L with stroke
ł	slash	l	0142	small L with stroke
œ	o	e	0153	small ligature OE
ṁ	m	period	1E41	small M with dot above
ṁ	period	m	1E41	small M with dot above
ń	apostrophe	n	0144	small N with acute
ń	n	apostrophe	0144	small N with acute
ň	less	n	0148	small N with caron
ň	n	less	0148	small N with caron
ņ	comma	n	0146	small N with cedilla
ņ	n	comma	0146	small N with cedilla
ñ	asciiTilde	n	00F1	small N with tilde
ñ	minus	n	00F1	small N with tilde
ñ	n	asciiTilde	00F1	small N with tilde
ñ	n	minus	00F1	small N with tilde
ó	acute	o	00F3	small O with acute
ó	apostrophe	o	00F3	small O with acute
ó	o	acute	00F3	small O with acute
ó	o	apostrophe	00F3	small O with acute
ô	asciicircum	o	00F4	small O with circumflex
ô	greater	o	00F4	small O with circumflex
ô	o	greater	00F4	small O with circumflex
ô	o	asciicircum	00F4	small O with circumflex
ö	diaeresis	o	00F6	small O with diaeresis
ö	o	diaeresis	00F6	small O with diaeresis
ö	o	quotedbl	00F6	small O with diaeresis
ö	quotedbl	o	00F6	small O with diaeresis
ò	grave	o	00F2	small O with grave
ò	o	grave	00F2	small O with grave
ø	o	slash	00F8	small O with stroke
ø	slash	o	00F8	small O with stroke
õ	asciiTilde	o	00F5	small O with tilde
õ	minus	o	00F5	small O with tilde
õ	o	minus	00F5	small O with tilde
õ	o	asciiTilde	00F5	small O with tilde
ṗ	p	period	1E57	small P with dot above
ṗ	period	p	1E57	small P with dot above
ŕ	apostrophe	r	0155	small R with acute
ŕ	r	apostrophe	0155	small R with acute
ř	less	r	0159	small R with caron
ř	r	less	0159	small R with caron
ŗ	comma	r	0157	small R with cedilla
ŗ	r	comma	0157	small R with cedilla
ś	apostrophe	s	015B	small S with acute
ś	s	apostrophe	015B	small S with acute
š	less	s	0161	small S with caron
š	s	less	0161	small S with caron
ş	cedilla	s	015F	small S with cedilla
ş	comma	s	015F	small S with cedilla
ş	s	comma	015F	small S with cedilla
ş	s	cedilla	015F	small S with cedilla
ṡ	period	s	1E61	small S with dot above
ṡ	s	period	1E61	small S with dot above
ß	s	s	00DF	small SHARP S
ť	less	t	0165	small T with caron
ť	t	less	0165	small T with caron
ṫ	period	t	1E6B	small T with dot above
ṫ	t	period	1E6B	small T with dot above
ŧ	slash	t	0167	small T with stroke
ŧ	t	minus	0167	small T with stroke
ŧ	t	slash	0167	small T with stroke
þ	t	h	00FE	small THORN
ú	acute	u	00FA	small U with acute
ú	apostrophe	u	00FA	small U with acute
ú	u	apostrophe	00FA	small U with acute
ú	u	acute	00FA	small U with acute
ŭ	u	u	01D4	small U with caron
û	asciicircum	u	00FB	small U with circumflex
û	greater	u	00FB	small U with circumflex
û	u	asciicircum	00FB	small U with circumflex
û	u	greater	00FB	small U with circumflex
ü	diaeresis	u	00FC	small U with diaeresis
ü	quotedbl	u	00FC	small U with diaeresis
ü	u	diaeresis	00FC	small U with diaeresis
ü	u	quotedbl	00FC	small U with diaeresis
ù	grave	u	00F9	small U with grave
ù	u	grave	00F9	small U with grave
ū	minus	u	016B	small U with macron
ū	u	minus	016B	small U with macron
ū	u	underscore	016B	small U with macron
ū	underscore	u	016B	small U with macron
ų	comma	u	0173	small U with ogonek
ų	u	comma	0173	small U with ogonek
ů	asterisk	u	016F	small U with ring above
ů	u	asterisk	016F	small U with ring above
ũ	asciiTilde	u	0169	small U with tilde
ũ	u	asciiTilde	0169	small U with tilde
ŵ	asciicircum	w	0175	small W with circumflex
ŵ	w	asciicircum	0175	small W with circumflex
ý	acute	y	00FD	small Y with acute
ý	apostrophe	y	00FD	small Y with acute
ý	y	acute	00FD	small Y with acute
ý	y	apostrophe	00FD	small Y with acute
ŷ	asciicircum	y	0177	small Y with circumflex
ŷ	y	asciicircum	0177	small Y with circumflex
ÿ	diaeresis	y	00FF	small Y with diaeresis
ÿ	quotedbl	y	00FF	small Y with diaeresis
ÿ	y	diaeresis	00FF	small Y with diaeresis
ÿ	y	quotedbl	00FF	small Y with diaeresis
ź	apostrophe	z	017A	small Z with acute
ź	z	apostrophe	017A	small Z with acute
ž	less	z	017E	small Z with caron
ž	v	z	017E	small Z with caron
ž	z	less	017E	small Z with caron
ż	period	z	017C	small Z with dot above
ż	z	period	017C	small Z with dot above

References

KDE Compose Key on userbase.KDE.org. Visit it for more detailed information and if you experience some issues.
Ubuntu: Compose Key on help.Ubuntu.com. Also contains some information on other Linux keyboard shortcuts for text symbols, such as Linux keyboard: Unicode hex codes composition .
Linux compose key sequences on help.ubuntu.com.

Here are other ways you can type text symbols on Linux with your keyboard.

Linux keyboard: Unicode hex codes composition

Linux keyboard text symbols: Third and fourth level choosers

Linux OS Character maps Type special symbols and text characters with the use of character map for Linux and Unix OS. ❡✽ ➦ ❥ ✪ GNOME's Gucharmap, KDE's KCharSelect Character Selector and Java character map.

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