colcrt - Filters text processor output for screen previewing
colcrt [- -2] [file...]
The colcrt command filters output from text processors such as nroff so
that it can be previewed on a cathode ray tube (CRT).
- Suppresses underlining; this is useful for previewing boxed tables from
-2 Causes all half-lines to be printed, effectively doublespacing the out-
put. This is useful when printing output with subscripts and super-
scripts on a line printer, where half-lines do not normally appear.
The colcrt command provides virtual half-linefeed and reverse linefeed
sequences for terminals without such capability, and on which overstriking
is destructive. The colcrt command changes underline characters to dashes
and places them and half-line characters on new lines in between the normal
1. colcrt cannot back up more than 102 lines.
2. General overstriking is lost; as a special case a | (vertical bar)
overstruck with a - (dash) or _ (underline) becomes a + (plus sign).
3. Lines are trimmed to 132 bytes.
The following command line illustrates a typical use of colcrt:
tbl exum2.n | nroff -ms | colcrt - | more
Commands: col(1), deroff(1), more(1), neqn(1), nroff(1), pg(1), tbl(1),