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Man Pages


Manual Reference Pages  -  COLCRT (1)

NAME

colcrt - filter nroff output for CRT previewing

CONTENTS

Synopsis
Description
Environment
Exit Status
Examples
See Also
History
Bugs

SYNOPSIS

colcrt [] [-2] []

DESCRIPTION

The colcrt utility 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 following options are available:
Suppress all underlining. This option is especially useful for previewing allboxed tables from tbl(1).
-2 Cause all half-lines to be printed, effectively 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.

ENVIRONMENT

The LANG, LC_ALL and LC_CTYPE environment variables affect the execution of colcrt as described in environ(7).

EXIT STATUS


.Ex -std

EXAMPLES

A typical use of colcrt would be
tbl exum2.n | nroff -ms | colcrt - | more

SEE ALSO

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

HISTORY

The colcrt command appeared in BSD 3.0 .

BUGS

Should fold underlines onto blanks even with the '' option so that a true underline character would show.

Cannot 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.

Characters that take up more than one column position may not be underlined correctly.

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