COLCRT(1) General Commands Manual COLCRT(1)
colcrt - filter nroff output for a terminal lacking overstrike capabil-
colcrt [ - ] [ -2 ] [ filename ... ]
colcrt provides virtual half and reverse LINEFEED sequences for termi-
nals without such capability, and on which overstriking is destructive.
Half LINEFEED characters and underlining (changed to dashing `-') are
placed on new lines in between the normal output lines.
- Suppress all underlining -- especially useful for previewing
allboxed tables from tbl(1).
-2 Print all half LINEFEED characters, effectively double spacing
the output. Normally, a minimal space output format is used
which suppresses empty lines. colcrt never suppresses two con-
secutive 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.
A typical use of colcrt would be
example% tbl exum2.n | nroff -ms | colcrt - | more
col(1V), more(1), nroff(1), tbl(1), troff(1), ul(1)
Cannot 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 sub-
scripts in documents which are already double-spaced.
9 September 1987 COLCRT(1)