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 Output version information and exit.
-h, help Output help and exit. EXAMPLES A typical use of colcrt would be
tbl exum2.n | nroff -ms | colcrt - | more SEE ALSO nroff(1), troff(1), col(1), more(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 sub‐
scripts 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 ⟨ftp://ftp.kernel.org/pub/linux/utils/util- linux/⟩.
util-linux September 2011 COLCRT(1)