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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 options are as follows:

     -       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
             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

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)

HISTORY    [Toc]    [Back]

     The colcrt command appeared in 3.0BSD.

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.

OpenBSD      3.6                           June      30,     1993
[ Back ]
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