COLCRT(1-BSD)       RISC/os Reference Manual        COLCRT(1-BSD)



NAME
     colcrt - filter nroff output for CRT previewing

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

DESCRIPTION
     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 optional - suppresses all underlining.  It is especially
     useful for previewing allboxed tables from tbl(1).

     The option -2 causes all half-lines to be printed, effec-
     tively 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, how-
     ever.  The -2 option is useful for sending output to the
     line printer when the output contains superscripts and sub-
     scripts which would otherwise be invisible.

     The option -r prevents underscores under blanks from being
     split across lines.  As an example, take the text
     ``hello_there_folks''.  Without -r, the text is printed as


          hello there folks
               _     _

     The -r option causes this to be printed as it was originally
     given.  Note that this may not be the correct thing to do
     when multiple words are underlined.

     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
     Can't back up more than 102 lines.

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

     Lines are trimmed to 132 characters.





                        Printed 11/19/92                   Page 1

COLCRT(1-BSD)       RISC/os Reference Manual        COLCRT(1-BSD)



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





















































 Page 2                 Printed 11/19/92