MirOS Manual: colcrt(1)

COLCRT(1)                    BSD Reference 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.

     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 suppresses two con-
             secutive empty lines, however. The -2 option is useful for send-
             ing output to the line printer when the output contains super-
             scripts 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)

HISTORY

     The colcrt command appeared in 3.0BSD.

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.

MirOS BSD #10-current           June 30, 1993                                1

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