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BSD 2.11 - man page for colcrt (bsd section 1)

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 dou- ble-spaced. 3rd Berkeley Distribution May 7, 1986 COLCRT(1)


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