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COLCRT
Section: User Commands (1)Updated: September 2011
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NAME
colcrt - filter nroff output for CRT previewingSYNOPSIS
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.
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)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.
HISTORY
The colcrt command appeared in 3.0BSD.AVAILABILITY
The colcrt command is part of the util-linux package and is available from Linux Kernel Archive