.\"***************************************************************************
-.\" Copyright (c) 1998-2013,2016 Free Software Foundation, Inc. *
+.\" Copyright (c) 1998-2017,2018 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: clear.1,v 1.16 2016/12/31 16:09:34 tom Exp $
+.\" $Id: clear.1,v 1.22 2018/07/28 21:45:40 tom Exp $
.TH @CLEAR@ 1 ""
.\" these would be fallbacks for DS/DE,
.\" but groff changed the meaning of the macros.
.de NS
-.ie \n(.sp
+.ie n .sp
.el .sp .5
-.ie \n(.in +4
+.ie n .in +4
.el .in +2
.nf
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.de NE
.fi
.ft R
-.in -4
+.ie n .in -4
+.el .in -2
..
.ie \n(.g .ds `` \(lq
.el .ds `` ``
.ie \n(.g .ds '' \(rq
.el .ds '' ''
.de bP
-.IP \(bu 4
+.ie n .IP \(bu 4
+.el .IP \(bu 2
..
.ds n 5
.SH NAME
\fB@CLEAR@\fR \- clear the terminal screen
.SH SYNOPSIS
-\fB@CLEAR@\fR
+\fB@CLEAR@\fR [\fB\-T\fR\fItype\fR] [\fB\-V\fP] [\fB\-x\fP]
.br
.SH DESCRIPTION
\fB@CLEAR@\fR clears your screen if this is possible,
-including its scrollback buffer (if the extended \*(``E3\*('' capability is defined).
+including its scrollback buffer
+(if the extended \*(``E3\*('' capability is defined).
\fB@CLEAR@\fR looks in the environment for the terminal type
given by the environment variable \fBTERM\fP,
and then in the
You can redirect the standard output to a file (which prevents
\fB@CLEAR@\fR from actually clearing the screen),
and later \fBcat\fP the file to the screen, clearing it at that point.
+.SH OPTIONS
.PP
-\fB@CLEAR@\fR ignores any command-line parameters that may be present.
-The analogous \*(``\fB@TPUT@\fP clear\*('' has command-line parameters
-including \fB\-T\fP for overriding the \fBTERM\fP environment variable.
+.TP 5
+.B \-T \fItype\fP
+indicates the \fItype\fR of terminal.
+Normally this option is
+unnecessary, because the default is taken from the environment
+variable \fBTERM\fR.
+If \fB\-T\fR is specified, then the shell
+variables \fBLINES\fR and \fBCOLUMNS\fR will also be ignored.
+.TP
+.B \-V
+reports the version of ncurses which was used in this program, and exits.
+The options are as follows:
+.TP
+.B \-x
+do not attempt to clear the terminal's scrollback buffer
+using the extended \*(``E3\*('' capability.
.SH HISTORY
A \fBclear\fP command appeared in 2.79BSD dated February 24, 1979.
Later that was provided in Unix 8th edition (1985).
although it was cited in the Red Hat bug report (#683733)
which led to the change.
.bP
-Again, a few other terminal developers adopted the feature. But the
+Again, a few other terminal developers adopted the feature.
+But the
next relevant step was a change to the \fBclear\fP program in 2013
to incorporate this extension.
.bP