colcrt man page on aLinux

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COLCRT(1)		  BSD General Commands Manual		     COLCRT(1)

NAME
     colcrt — filter nroff output for CRT previewing

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

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.

AVAILABILITY
     The colcrt command is part of the util-linux-ng package and is available
     from ftp://ftp.kernel.org/pub/linux/utils/util-linux-ng/.

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