colcrt - filter nroff output for CRT previewing
colcrt [options] [file ...]
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.
The colcrt command appeared in 3.0BSD.
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.
A typical use of colcrt would be:
tbl exum2.n | nroff -ms | colcrt - | more
For bug reports, use the issue tracker at <https://github.com/util-linux/util-linux/issues>.
The colcrt command is part of the util-linux package which can be downloaded from Linux Kernel Archive <https://www.kernel.org/pub/linux/utils/util-linux/>.