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colcrt(1) [bsd man page]

COLCRT(1)						      General Commands Manual							 COLCRT(1)

NAME
colcrt - filter nroff output for CRT previewing SYNOPSIS
colcrt [ - ] [ -2 ] [ file ... ] 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. The optional - suppresses all underlining. It is especially useful for previewing allboxed tables from tbl(1). The option -2 causes 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. A typical use of colcrt would be tbl exum2.n | nroff -ms | colcrt - | more SEE ALSO
nroff/troff(1), col(1), more(1), ul(1) BUGS
Should fold underlines onto blanks even with the `-' option so that a true underline character would show; if we did this, however, colcrt wouldn't get rid of cu'd underlining completely. 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. 3rd Berkeley Distribution May 7, 1986 COLCRT(1)

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COLCRT(1)						    BSD General Commands Manual 						 COLCRT(1)

NAME
colcrt -- filter nroff output for CRT previewing SYNOPSIS
colcrt [-] [-2] [file ...] DESCRIPTION
The colcrt utility provides virtual half-line and reverse line feed sequences for terminals without such capability, and on which overstrik- ing 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). EXAMPLES
A typical use of colcrt would be tbl exum2.n | nroff -ms | colcrt - | more DIAGNOSTICS
The colcrt utility exits 0 on success, and >0 if an error occurs. SEE ALSO
col(1), more(1), nroff(1), troff(1), ul(1) BUGS
Should fold underlines onto blanks even with the '-' option so that a true underline character would show. 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. Characters that take up more than one column position may not be underlined correctly. HISTORY
The colcrt command appeared in 3.0BSD. BSD
July 31, 2004 BSD

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