|COLCRT(1)||General Commands Manual||COLCRT(1)|
colcrt — filter
nroff output for CRT previewing
colcrt utility 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 following options are available:
- Suppress all underlining. This option is especially useful for previewing allboxed tables from tbl(1).
- Cause 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.
-2option is useful for sending output to the line printer when the output contains superscripts and subscripts which would otherwise be invisible.
LC_CTYPE environment variables affect the
colcrt as described in
colcrt utility exits 0 on
success, and >0 if an error occurs.
A typical use of
colcrt would be
tbl exum2.n | nroff -ms | colcrt - | more
colcrt command appeared in
Should fold underlines onto blanks even with the
-’ option so that a true underline
character would show.
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 subscripts in documents which are already double-spaced.
Characters that take up more than one column position may not be underlined correctly.
|July 31, 2004||Debian|