COLCRT(1) UNIX Programmer's Manual COLCRT(1)
colcrt - filter nroff output for CRT previewing
S
\bSY
\bYN
\bNO
\bOP
\bPS
\bSI
\bIS
\bS
c
\bco
\bol
\blc
\bcr
\brt
\bt [ -
\b- ] [ -
\b-2
\b2 ] [ file ... ]
D
\bDE
\bES
\bSC
\bCR
\bRI
\bIP
\bPT
\bTI
\bIO
\bON
\bN
_
\bC_
\bo_
\bl_
\bc_
\br_
\bt 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 -
\b- suppresses all underlining. It is especially
useful for previewing _
\ba_
\bl_
\bl_
\bb_
\bo_
\bx_
\be_
\bd tables from _
\bt_
\bb_
\bl(1).
The option -
\b-2
\b2 causes all half-lines to be printed, effec-
tively 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, how-
ever. The -
\b-2
\b2 option is useful for sending output to the
line printer when the output contains superscripts and sub-
scripts which would otherwise be invisible.
A typical use of _
\bc_
\bo_
\bl_
\bc_
\br_
\bt would be
tbl exum2.n | nroff -ms | colcrt - | more
S
\bSE
\bEE
\bE A
\bAL
\bLS
\bSO
\bO
nroff/troff(1), col(1), more(1), ul(1)
Should fold underlines onto blanks even with the `-
\b-' option
so that a true underline character would show; if we did
this, however, _
\bc_
\bo_
\bl_
\bc_
\br_
\bt wouldn't get rid of _
\bc_
\bu'_
\bd underlining
Can't back up more than 102 lines.
General overstriking is lost; as a special case `|' over-
struck 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.
Printed 7/9/88 May 7, 1986 1
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