.\"***************************************************************************
-.\" Copyright (c) 2008,2009 Free Software Foundation, Inc. *
+.\" Copyright (c) 2008-2009,2010 Free Software Foundation, Inc. *
.\" *
.\" Permission is hereby granted, free of charge, to any person obtaining a *
.\" copy of this software and associated documentation files (the *
.\" authorization. *
.\"***************************************************************************
.\"
-.\" $Id: tabs.1,v 1.3 2009/09/05 17:06:08 tom Exp $
+.\" $Id: tabs.1,v 1.7 2010/07/31 18:17:37 tom Exp $
.TH @TABS@ 1 ""
.ds n 5
.SH NAME
-\fBtabs\fR - set tabs on a terminal
+\fBtabs\fR \- set tabs on a terminal
.SH SYNOPSIS
-\fBtabs\fR [\fB-v\fR[\fIn\fR]] [\fB-ahuUV\fR] \fIfile...\fR
+\fBtabs\fR [\fB\-v\fR[\fIn\fR]] [\fB\-ahuUV\fR] \fIfile...\fR
.br
.SH DESCRIPTION
.PP
.SH OPTIONS
.SS General Options
.TP 5
-.BI -T "name"
+.BI \-T "name"
Tell \fBtabs\fP which terminal type to use.
If this option is not given, \fBtabs\fP will use the \fB$TERM\fP
environment variable.
If that is not set, it will use the \fIansi+tabs\fP entry.
.TP 5
-.B -d
+.B \-d
The debugging option shows a ruler line, followed by two data lines.
The first data line shows the expected tab-stops marked with asterisks.
The second data line shows the actual tab-stops, marked with asterisks.
.TP 5
-.B -n
+.B \-n
This option tells \fBtabs\fP to check the options and run any debugging
option, but not to modify the terminal settings.
.PP
The last option to be processed which defines a list is the one that
determines the list to be processed.
.SS Implicit Lists
-Use a single number as an option, e.g., "\fB-5\fP" to set tabs at the given
+Use a single number as an option, e.g., "\fB\-5\fP" to set tabs at the given
interval (in this case 1, 6, 11, 16, 21, etc.). Tabs are repeated up to
the right margin of the screen.
+.PP
+Use "\fB\-0\fP" to clear all tabs.
+.PP
+Use "\fB\-8\fP" to set tabs to the standard interval.
.SS Explicit Lists
-An explicit list can be defined after the options (this does not use a "-").
+An explicit list can be defined after the options (this does not use a "\-").
The values in the list must be in increasing numeric order, and greater than
zero. They are separated by a comma or a blank, for example,
.sp
.SS Predefined Tab-Stops
X/Open defines several predefined lists of tab stops.
.TP 5
-.B -a
+.B \-a
Assembler, IBM S/370, first format
.TP 5
-.B -a2
+.B \-a2
Assembler, IBM S/370, second format
.TP 5
-.B -c
+.B \-c
COBOL, normal format
.TP 5
-.B -c2
+.B \-c2
COBOL compact format
.TP 5
-.B -c3
+.B \-c3
COBOL compact format extended
.TP 5
-.B -f
+.B \-f
FORTRAN
.TP 5
-.B -p
+.B \-p
PL/I
.TP 5
-.B -s
+.B \-s
SNOBOL
.TP 5
-.B -u
+.B \-u
UNIVAC 1100 Assembler
.SH PORTABILITY
.PP
X/Open describes a \fB+m\fP option, to set a terminal's left-margin.
-None of the entries in the terminal database provide this capability.
+Very few of the entries in the terminal database provide this capability.
.PP
-The \fB-d\fP (debug) and \fB-n\fP (no-op) options are extensions not provided
+The \fB\-d\fP (debug) and \fB\-n\fP (no-op) options are extensions not provided
by other implementations.
.PP
Documentation for other implementations states that there is a limit on the