COLCRT (1)
colcrt
filter nroff output for CRT previewing
SYNOPSIS
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.
Available options:
-tag -width Ds
Fl
Suppress all underlining.
This option is especially useful for previewing
allboxed
tables from
tbl 1 .
Fl 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 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.
EXAMPLES
A typical use of
colcrt
would be
-literal
tbl exum2.n | nroff -ms | colcrt - | more
SEE ALSO
BUGS
Should fold underlines onto blanks even with the
Fl
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
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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
command appeared in
3.0 .
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