diff --git a/test/gdc.6 b/test/gdc.6
index ed3a4f1..bf90b26 100644
--- a/test/gdc.6
+++ b/test/gdc.6
@@ -1,5 +1,6 @@
 .\"***************************************************************************
-.\" Copyright (c) 1998-2003,2006 Free Software Foundation, Inc.              *
+.\" Copyright 2020 Thomas E. Dickey                                          *
+.\" Copyright 1998-2006,2017 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            *
@@ -26,16 +27,12 @@
 .\" authorization.                                                           *
 .\"***************************************************************************
 .\"
-.\" $Id: gdc.6,v 1.3 2006/04/22 23:02:15 tom Exp $
-.TH GDC 6
+.\" $Id: gdc.6,v 1.6 2020/02/02 23:34:34 tom Exp $
+.TH GDC 6 2020-02-02 ncurses-examples Games
 .SH NAME
 gdc \- grand digital clock (curses)
 .SH SYNOPSIS
-.B gdc
-[-n] [
-[-s] [
-.I n
-]
+.B gdc \fP[\fIoptions\fP] [\fIn\fP]
 .SH DESCRIPTION
 .I Gdc
 runs a digital clock made of reverse-video blanks on a terminal screen.
@@ -44,14 +41,20 @@
 ``s'' or space, respectively.
 .SH OPTIONS
 .TP
-.B -n
+.B \-d
+use terminal's default colors for the background.
+.TP
+.B \-n
 redirects input to /dev/null, making it ignore the stop/pause commands.
 You can still stop it by pressing the interrupt key.
 .TP
-.B -s
+.B \-s
 makes digits scroll as they change.
 When running on a fast display, the program breaks up the scrolling into
 subsecond repaints, making the operation appear smooth.
+.TP
+.B \-t \fIhh:mm:ss\fP
+specify starting time (default is ``now'').
 .PP
 With an optional numeric argument
 .I num
@@ -61,4 +64,5 @@
 Normally it runs "forever" (counting down from 2 billion seconds).
 .SH AUTHOR
 Amos Shapir, modified for curses by John Lupien.
+.br
 Improvements for ncurses by Thomas Dickey.