colcrt(1) - phpMan

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

NAME
     colcrt - filter nroff output for CRT previewing

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

DESCRIPTION
     The colcrt utility 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.  Nor-
             mally, 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
     col(1), more(1), nroff(1), troff(1), ul(1)

BUGS
     Should fold underlines onto blanks even with the '-' option so that a true underline charac-
     ter 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.

BSD                                       June 30, 1993                                       BSD

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