colcrt(1)colcrt(1)NAMEcolcrt - Filters text processor output for screen previewing
SYNOPSIScolcrt [- -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).
OPTIONS
Suppresses underlining; this is useful for previewing boxed tables from
tbl. Causes all half-lines to be printed, effectively doublespacing
the output. This is useful when printing output with subscripts and
superscripts on a line printer, where half-lines do not normally
appear.
DESCRIPTION
The colcrt command provides virtual half-linefeed and reverse linefeed
sequences for terminals without such capability, and on which over‐
striking is destructive. The colcrt command changes underline charac‐
ters to dashes and places them and half-line characters on new lines in
between the normal output lines.
NOTEScolcrt cannot back up more than 102 lines. General overstriking is
lost; as a special case a | (vertical bar) overstruck with a - (dash)
or _ (underline) becomes a + (plus sign). Lines are trimmed to 132
bytes.
EXAMPLES
The following command line illustrates a typical use of colcrt: tbl
exum2.n | nroff -ms | colcrt - | more
SEE ALSO
Commands: col(1), deroff(1), more(1), neqn(1), nroff(1), pg(1),
tbl(1), ul(1)colcrt(1)