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KEYBOARD(6)							   KEYBOARD(6)

NAME
       keyboard - how to type characters

DESCRIPTION
       Keyboards are idiosyncratic.  It should be obvious how to type ordinary
       ASCII characters, backspace, tab, escape, and newline.  In Plan 9,  the
       key  labeled  Return or Enter generates a newline (0x0A); if there is a
       key labeled Line Feed, it generates a carriage return  (0x0D);  Plan  9
       eschews	CRLFs.	 All control characters are typed in the usual way; in
       particular, control-J is a line feed and control-M a  carriage  return.
       On the PC and some other machines, the key labeled Caps Lock acts as an
       additional control key.

       The delete character (0x7F) may be generated by a  different  key,  one
       near  the  extreme  upper right of the keyboard.	 On the Next it is the
       key labeled (not the asterisk above the 8).  On the SLC	and  Sparcsta‐
       tion  2,	 delete	 is  labeled Num Lock (the key above Backspace labeled
       Delete functions as an additional backspace key).  On  the  other  key‐
       boards, the key labeled Del or Delete generates the delete character.

       The  view character (0x80), used by rio(1), acme(1), and sam(1), causes
       windows to scroll forward.  It is generally somewhere  near  the	 lower
       right  of  the main key area.  The scroll character is generated by the
       VIEW key on the Gnot, the Alt Graph key on the SLC, and the arrow key ↓
       on the other terminals.	As a convenience for sloppy typists, some pro‐
       grams interpret → and ← keys, which lie on either side of  ↓,  as  view
       keys as well.  The arrow key ↑ scrolls backward.

       Characters  in  Plan  9	are runes (see utf(6)).	 Any rune can be typed
       using a compose key followed by several other keys.  The compose key is
       also  generally	near the lower right of the main key area: the NUM PAD
       key on the Gnot, the Alternate key on the Next, the Compose key on  the
       SLC, the Option key on the Magnum, and either Alt key on the PC.	 After
       typing the compose key, type a capital  and  exactly  four  hexadecimal
       characters (digits and to to type a single two-byte rune with the value
       represented by the typed number.	 Type a lower case  and	 exactly  UTF‐
       max*2 hexadecimal characters to type a single UTFmax bytes rune.	 There
       are shorthands for many characters, comprising the compose key followed
       by a two- or three-character sequence.  There are several rules guiding
       the design of the sequences, as illustrated by the following  examples.
       The  full list is too long to repeat here, but is contained in the file
       in a format suitable for grep(1) or look(1).

	      A repeated symbol gives a	 variant  of  that  symbol,  e.g.,  ??
	      yields ¿.

	      ASCII digraphs for mathematical operators give the corresponding
	      operator, e.g., <= yields ≤.

	      Two letters give the corresponding ligature, e.g., AE yields Æ.

	      Mathematical and other symbols are given	by  abbreviations  for
	      their names, e.g., pg yields ¶.

	      Chess  pieces are given by a w or b followed by a letter for the
	      piece (k for king, q for queen, r for rook, n for knight, b  for
	      bishop, or p for pawn), e.g., wk for a white king.

	      Greek letters are given by an asterisk followed by a correspond‐
	      ing latin letter, e.g., *d yields δ.

	      Cyrillic letters are given by an at sign followed	 by  a	corre‐
	      sponding latin letter or letters, e.g., @ya yields я.

	      Script letters are given by a dollar sign followed by the corre‐
	      sponding regular letter, e.g., $F yields ℱ.

	      A digraph of a symbol followed by a letter gives the letter with
	      an accent that looks like the symbol, e.g., ,c yields ç.

	      Two  digits  give the fraction with that numerator and denomina‐
	      tor, e.g., 12 yields ½.

	      The letter s followed by a character gives that character	 as  a
	      superscript, e.g., s1 yields ⁱ.  These characters are taken from
	      the Unicode block 0x2070; the 1, 2, and 3	 superscripts  in  the
	      Latin-1 block are available by using a capital S instead of s.

	      Sometimes	 a  pair  of  characters  give a symbol related to the
	      superimposition of the characters, e.g., cO yields ©.

	      A mnemonic letter followed by $ gives a currency	symbol,	 e.g.,
	      l$ yields £.

       Note  the  difference between ß (ss) and µ (micron) and the Greek β and
       μ.

FILES
       /lib/keyboard
	      sorted table of characters and keyboard sequences

SEE ALSO
       intro(1), ascii(1), tcs(1), acme(1), rio(1), sam(1), cons(3), utf(6)

								   KEYBOARD(6)

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