1 files changed, 9 insertions, 1 deletions
diff --git a/doc/tk.n b/doc/tk.n
index 4114d31..a966b1d 100644
--- a/doc/tk.n
+++ b/doc/tk.n
@@ -5,7 +5,7 @@
 '\" See the file "license.terms" for information on usage and redistribution
 '\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
 '\" 
-'\" RCS: @(#) $Id: tk.n,v 1.6 2002/06/22 00:37:16 dkf Exp $
+'\" RCS: @(#) $Id: tk.n,v 1.7 2002/09/02 22:00:37 hobbs Exp $
 '\" 
 .so man.macros
 .TH tk n 8.4 Tk "Tk Built-In Commands"
@@ -92,5 +92,13 @@ will always return 0.  If the \fIwindow\fR argument is omitted, it defaults
 to the main window.  If the \fIboolean\fR argument is omitted, the current
 state is returned.  This is turned on by default for the main display.
 .VE
+.VS 8.4
+.TP
+\fBtk windowingsystem\fR
+.
+Returns the current Tk windowing system, one of
+\fBx11\fR (X11-based), \fBwin32\fR (MS Windows),
+\fBclassic\fR (Mac OS Classic), or \fBaqua\fR (Mac OS X Aqua).
+.VE
 .SH KEYWORDS
 application name, send