COLCRT
Section: User Commands (1)
Updated: September 2011
Page Index
NAME
colcrt - filter nroff output for CRT previewing
SYNOPSIS
colcrt
[options]
[
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.
OPTIONS
- -, --no-underlining
-
Suppress all underlining. This option is especially useful for previewing
allboxed
tables from
tbl(1).
- -2, --half-lines
-
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, --version
-
Display version information and exit.
- -h, --help
-
Display help text and exit.
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.
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)
AVAILABILITY
The colcrt command is part of the util-linux package and is available from
Linux Kernel Archive