COLCRT(1) |
General Commands Manual |
COLCRT(1) |
NAME
colcrt — filter nroff output for CRT previewing
SYNOPSIS
colcrt |
[-] [-2] [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.
Available options:
-
-
-
Suppress all underlining. This option is especially useful for previewing allboxed tables from tbl(1).
-
-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
tbl exum2.n | nroff -ms | colcrt - | more
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.