NAME

colcrt − filter nroff output for a terminal lacking overstrike capability

SYNOPSIS

colcrt [ − ] [ −2 ] [ filename ... ]

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

−Suppress all underlining — especially useful for previewing allboxed tables from tbl(1). 

−2Print all half-lines, effectively double spacing the output.  Normally, a minimal space output format is used which suppresses empty lines.  colcrt 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

SEE ALSO

col(1V), more(1), nroff(1), tbl(1), troff(1), ul(1)

BUGS

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. 

Sun Release 4.0  —  Last change: 9 September 1987