




COLCRT (1)             Commands and Applications              COLCRT (1)









NAME  

        colcrt - filter nroff output for CRT previewing 



SYNOPSIS  

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

        colcrt -V 



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.  



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.  



        -V  

                Prints version information and exits.  



EXAMPLES  

        A typical use of colcrt would be 



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



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.  













GNO                         January 22, 1998                      Page 1









COLCRT (1)             Commands and Applications              COLCRT (1)







HISTORY  

        The colcrt command appeared in 3.0BSD.  



ATTRIBUTIONS  

        This   command   was   ported   from  FreeBSD  source  code  for

        distribution with GNO/ME 2.0.6.  



        This  program  contains  material  from  the   ORCA/C   Run-Time

        Libraries,  copyright  1987-1998  by  Byte Works, Inc. Used with

        permission.  



SEE ALSO  

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

























































































GNO                         January 22, 1998                      Page 2





