NAME

colcrt − filter nroff output for CRT previewing

SYNTAX

colcrt [−] [−2] [file...]

DESCRIPTION

The colcrt command 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

−Suppresses all underlining.  It is especially useful for previewing allboxed tables from tbl(.).

−2Causes half-lines to be printed, 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. 

EXAMPLE

A typical use of colcrt would be:

tbl exum2.n | nroff −ms | colcrt − | more

RESTRICTIONS

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. 

SEE ALSO

col(1), more(1), nroff(1), ul(1)

Commands