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NAME    [Toc]    [Back]

     colcrt -- filter nroff output for CRT previewing

SYNOPSIS    [Toc]    [Back]

     colcrt [-] [-2] [file ...]

DESCRIPTION    [Toc]    [Back]

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

     The following options are available:

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

     -2      Cause 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    [Toc]    [Back]

     A typical use of colcrt would be

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

SEE ALSO    [Toc]    [Back]

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

BUGS    [Toc]    [Back]

     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    [Toc]    [Back]

     The colcrt command appeared in 3.0BSD.

FreeBSD 5.2.1			 June 30, 1993			 FreeBSD 5.2.1
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