n&nbsp;</code></td><td valign="top" class="PROPERTYTABLE"><value>[x y w h]</value></td><td valign="top" class="PROPERTYTABLE"><description>The position (x,y) and size (w,h) of the layout.</description></td></tr><tr><td valign="top" class="PROPERTYTABLE"><code>SelectedChild&nbsp;</code></td><td valign="top" class="PROPERTYTABLE"><value>positive integer or empty</value></td><td valign="top" class="PROPERTYTABLE"><description>Which child is visible.</description></td></tr><tr><td valign="top" class="PROPERTYTA