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Encyclopedia > Compose key
The compose key and compose LED on a Sun Type 5, 6 and 7 keyboards is the second-last key on the bottom row
The compose key and compose LED on a Sun Type 5, 6 and 7 keyboards is the second-last key on the bottom row
The compose key on a DEC LK201 keyboard is the leftmost key on the bottom row
The compose key on a DEC LK201 keyboard is the leftmost key on the bottom row

On some computer systems, a compose key is a key which is designated to signal the software to interpret the next keystrokes as a combination in order to produce a character not found on the keyboard. Image File history File linksMetadata Download high-resolution version (2048x1536, 1398 KB) File links The following pages on the English Wikipedia link to this file (pages on other projects are not listed): Compose key Metadata This file contains additional information, probably added from the digital camera or scanner used to... Image File history File linksMetadata Download high-resolution version (2048x1536, 1398 KB) File links The following pages on the English Wikipedia link to this file (pages on other projects are not listed): Compose key Metadata This file contains additional information, probably added from the digital camera or scanner used to... Image File history File linksMetadata No higher resolution available. ... Image File history File linksMetadata No higher resolution available. ... This article is about the machine. ... Computer software (or simply software) refers to one or more computer programs and data held in the storage of a computer for some purpose. ...


For example, typing compose, then a, then e may produce the AE ligature, æ. Typing compose, then e, then ' can yield an e with an acute accent, é. It has been suggested that this article or section be merged with Ligature (palaeography). ...


The compose key is known as "Multi_key" in the X Window System. In XFree86 and X.Org Server, many keyboard layouts have a variant that maps Multi_key to some key, usually (on PC keyboards) to either of the Windows keys. It can also be specified in XkbOptions (for example, "compose:rwin"). Multi_key can also be assigned with the xmodmap(1) utility. “X11” redirects here. ... XFree86 is an implementation of the X Window System . ... The X.Org Server (officially the ) is the official reference implementation of the X Window System. ... A Windows key on a black laptop keyboard The Windows key or Windows logo key (in short WinKey, or rarely Flag key) is a keyboard key originally introduced for the Windows 95 operating system. ...

Some common compose combinations
Hitting
compose
then
this
and
then
this
renders
this
' a á
' A Á
" or : a ä
" or : A Ä
` a à
` A À
~ a ã
~ A Ã
^ a â
^ A Â
* a å
* A Å
Vowels support most of the above
, c ç
, C Ç
O R ®
O C ©
< < «
> >  »
. . ·
x x ×
-  : ÷
^ 0 °
^ 1 ¹
^ 2 ²
^ 3 ³
s o/0 §
1 2 ½
1 4 ¼
3 4 ¾
o / ø
O / Ø
d - ð
D - Ð
n - ñ
t h þ
T H Þ
a e æ
A E Æ
 !  ! ¡
 ?  ? ¿
l/L - £
y/Y -/= ¥
c ¢
s $
o x ¤
/ /

Originally the currency sign on the keyboards were nationalized, and not every keyboard sold in the world contained a dollar sign ($), which explains why it appears there, although it is part of any standard keyboard since the 1990s. In particular the $ compose sequence ceased to work on modern systems. The historic backslash sequence (compose-//) witnesses of the similar situation for this key and is still working on modern systems. A cedilla is a hook (¸) added under certain consonant letters as a diacritical mark to modify their pronunciation. ... A cedilla is a hook (¸) added under certain consonant letters as a diacritical mark to modify their pronunciation. ... “(TM)” redirects here. ... Not to be confused with copywriting. ... Eth (Ð, ð), also spelled edh or eð, is a letter used in Old English (Anglo-Saxon) and present-day Icelandic, and in Faroese language which call the letter edd. ... Eth (Ð, ð), also spelled edh or eð, is a letter used in Old English (Anglo-Saxon) and present-day Icelandic, and in Faroese language which call the letter edd. ... Ñ and ñ in Arial and Times New Roman, with an example word from Panare Ñ is a letter of the modern Roman alphabet formed by an N with a diacritical tilde. ... Þþ Thorn, or þorn (Þ, þ), is a letter in the Anglo-Saxon and Icelandic alphabets. ... Þþ Thorn, or þorn (Þ, þ), is a letter in the Anglo-Saxon and Icelandic alphabets. ... n. ... n. ... An exclamation mark (also exclamation point, and, rarely, mark of admiration) is a punctuation mark. ... A quazzy mark is an inverted question mark. ...


The table shown contains the traditional key compositions that had become a de-facto Sun/DEC/Falco standard. Particularly for modern systems which support customisable compose sequences and Unicode, the table would be far from complete. Given the vast number of sequences permissible and the vast number of characters desirable in Unicode, a complete table would be incredibly long. Sun Microsystems, Inc. ... The DEC logo Digital Equipment Corporation was a pioneering American company in the computer industry. ...


The compose key can be found on the LK201 family of keyboards from Digital Equipment Corporation and its successors. The key can also be found on keyboards from Sun Microsystems. The new style keyboard, introduced in 1982, used by Digital Equipment Corporations VT220 ANSI/ASCII terminal. ... The DEC logo Digital Equipment Corporation was a pioneering American company in the computer industry. ... Sun Microsystems, Inc. ...


On Mac OS X, the "option" key provides access to some extended characters. For example, holding down option and pressing a results in å; holding down option and pressing ` will create a highlighted ` character which will be added to the next letter if possible - so if an e is then pressed, the resultant character is è, while if an r is pressed the two characters are not compatible so the result is `r.


Microsoft Windows does not use a compose key, but it does support dead keys and AltGr for many characters. Other characters can be generated by holding down Alt, and then typing the ASCII code or Unicode code corresponding to the desired character on the numeric keypad. “Windows” redirects here. ... It has been suggested that this article or section be merged with Combining character. ... AltGr is a modifier key on PC keyboards used to type many characters, primarily ones that are unusual for the locale of the keyboard layout, such as foreign currency symbols and accented letters. ... The Alt key on a modern Windows keyboard The Alt key on an IBM PC keyboard is the key located immediately to either side of the Space bar, used to change (alternate) the function of other pressed keys. ... Image:ASCII fullsvg There are 95 printable ASCII characters, numbered 32 to 126. ... In PCs running the Microsoft Windows operating system, additional characters to those available by the current keyboard layout may be typed using the Alt key in conjunction with the keyboards numeric pad. ... The Unicode Standard, Version 5. ...


There is also an Open Source utility available called AllChars that emulates the compose key using a selectable modifier key like Control or Shift. What characters it can create depend on the currently chosen code page and screen font, but most Western, Central, and Eastern European character sets are covered by predefined configuration files. The compose combinations can be customized by the user. Open source refers to projects that are open to the public and which draw on other projects that are freely available to the general public. ... In economics, utility is a measure of the relative happiness or satisfaction (gratification) gained. ... Code page is the traditional IBM term used for a specific character encoding table: a mapping in which a sequence of bits, usually a single octet representing integer values 0 through 255, is associated with a specific character. ... A font can mean: A member of a typeface family; or digital font - file format that encapsulates a typeface family in a database. ... A character encoding is a code that pairs a set of characters (such as an alphabet or syllabary) with a set of something else, such as numbers or electrical pulses. ...


External links

  • XFree86 Compose Key character map by XFree86
  • Everything2's list of Compose Key combinations
  • SUN's Compose Key combinations used under CDE
  • Setting up Compose Key in the X Window System
  • Using the Compose Key in the X Window System
  • A Unix utility to lookup the Compose Key for the specified character
  • AllChars, an open-source utility that emulates the Compose key under MS-Windows
  • JLG Extended Keyboard Layout - yet another utility based on the Compose Key mechanism under Windows

  Results from FactBites:
 
KEYMAPS (1652 words)
Which of the actions bound to a given key is taken when it is pressed depends on what modifiers are in effect at that moment.
For example, binding the symbol Shift to a key sets the Shift modifier in effect when that key is pressed and cancels the effect of that modifier when the key is released.
Key number 58 is normally the Caps Lock key, and key number 29 is normally the Control key.
  More results at FactBites »


 
 

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