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Annotation of coherent/a/usr/man/COHERENT/col, revision 1.1.1.1

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                      3: col                          Command                          col
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                      8: Remove reverse and half-line motions
                      9: 
                     10: ccooll [ -bbddffxx ][ -pp_n ]
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                     12: The command col reads the  standard input and writes to the stan-
                     13: dard output.   It removes reverse and  half-line motions from the
                     14: output of  nroff for  the benefit  of output devices  that cannot
                     15: perform them.   It maintains an  image of the page  in memory and
                     16: performs these  motions virtually  so they  do not appear  on the
                     17: output.
                     18: 
                     19: col understands  four escape sequences: <esc>  7 for reverse line
                     20: feed, <esc> 8  for half reverse line feed, <esc>  9 for half for-
                     21: ward line feed, and <esc> B  for a forward line feed.  It removes
                     22: <esc> (ASCII 033) from the input  stream if it is followed by any
                     23: other character.
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                     25: Eight control  characters besides  <esc> are interpreted  by col.
                     26: Newline,  return, space,  backspace,  and tab  carry their  usual
                     27: meaning.  VT  (013) is  an alternate  form of reverse  line feed.
                     28: The characters SO (017) and SI  (016) signal the start and end of
                     29: text in an  alternate character set.  col remembers the character
                     30: set for each character and uses  SO and SI to distinguish them on
                     31: the output.   col removes all  other control characters  from the
                     32: input stream.
                     33: 
                     34: ccooll recognizes the following options:
                     35: 
                     36: -bb  The  output device cannot backspace.  Only the  last of a set
                     37:     of characters destined for a given position will appear.
                     38: 
                     39: -dd  Double-space the output.   This doubles the length of a docu-
                     40:     ment but preserves  relative vertical spacing.  The -f option
                     41:     has precedence.
                     42: 
                     43: -ff  The output  device can perform half-forward line feeds.  Full
                     44:     lines  appear single  spaced  with half  lines between  them.
                     45:     This is  the only situation in which  half forward line feeds
                     46:     appear in the output of col -- reverse line motions never ap-
                     47:     pear.
                     48: 
                     49: -xx  Suppress  the default  conversion of  white space to  tabs on
                     50:     output.
                     51: 
                     52: -pp _n
                     53:     Set the  internal page buffer size to  n full lines (default,
                     54:     128).
                     55: 
                     56: If neither -f nor -d is chosen, col moves non-empty half lines to
                     57: the  next lower  full line  and pushes all  later lines  down one
                     58: line.  This can distort the appearance of the document.
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                     64: COHERENT Lexicon                                           Page 1
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                     68: 
                     69: col                          Command                          col
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                     72: 
                     73: ***** See Also *****
                     74: 
                     75: ASCII, commands, nroff
                     76: 
                     77: ***** Notes *****
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                     79: Backing up  past the start  of a document  or of the  page buffer
                     80: loses characters.
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                    130: COHERENT Lexicon                                           Page 2
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