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colcrt




DESCRIPTION

     Colcrt provides virtual half-line and reverse line feed sequences for
     terminals without such capability, and on which overstriking is destruc­
     tive.  Half-line characters and underlining (changed to dashing `-') are
     placed on new lines in between the normal output lines.

     Available options:

     -       Suppress all underlining.  This option is especially useful for
             previewing allboxed tables from tbl(1).

     -2      Causes all half-lines to be printed, effectively double spacing
             the output.  Normally, a minimal space output format is used
             which will suppress empty lines.  The program never suppresses
             two consecutive empty lines, however.  The -2 option is useful
             for sending output to the line printer when the output contains
             superscripts and subscripts which would otherwise be invisible.


EXAMPLES

     A typical use of colcrt would be

     tbl exum2.n | nroff -ms | colcrt - | more


SEE ALSO

     nroff(1), troff(1), col(1), more(1), ul(1)


BUGS

     Should fold underlines onto blanks even with the `-' option so that a
     true underline character would show.

     Can't back up more than 102 lines.

     General overstriking is lost; as a special case `|' overstruck with `-'
     or underline becomes `+'.

     Lines are trimmed to 132 characters.

     Some provision should be made for processing superscripts and subscripts
     in documents which are already double-spaced.


HISTORY

     The colcrt command appeared in 3.0BSD.

3rd Berkeley Distribution        June 30, 1993       3rd Berkeley Distribution
  
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