colcrt.1

来自「<B>Digital的Unix操作系统VAX 4.2源码</B>」· 1 代码 · 共 54 行

.\" SCCSID: @(#)colcrt.1	8.1	9/11/90
.TH colcrt 1
.SH Name
colcrt \- filter nroff output for CRT previewing
.SH Syntax
.B colcrt
[\fB\-\fR] [\fB\-2\fR] [\|\fIfile...\fR\|]
.SH Description
.NXR "colcrt command"
.NXA "nroff text processor" "colcrt command"
.NXA "colcrt command" "ul command"
.NXR "nroff text processor" "previewing output"
The
.PN colcrt
command
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.
.SH Options
.IP \fB\-\fR 0.3i 
Suppresses all underlining.
It is especially useful for previewing
.I allboxed
tables from
.MS tbl 1 .
.IP \fB\-2\fR 0.3i
Causes half-lines to be printed,
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
.B \-2
option is useful for sending output to the line printer when the output
contains superscripts and subscripts which would otherwise be invisible.
.SH Examples
A typical use of
.PN colcrt
would be:
.EX
tbl exum2.n | nroff \-ms | colcrt \- | more
.EE
.SH Restrictions
Can't back up more than 102 lines.
.PP
General overstriking is lost;
as a special case `|' overstruck with `\-' or underline becomes `+'.
.PP
Lines are trimmed to 132 characters.
.SH See Also
col(1), more(1), nroff(1), ul(1)