+ <TextBlock x:Name="txtImageNumber" Padding="2" Text="42" HorizontalAlignment="Right" VerticalAlignment="Bottom" Background="#4C000000" Foreground="White" Margin="0,0,3,3"/>
+ <Rectangle x:Name="viewport" Margin="24,30,71,26" Stroke="#BFFFFF00" RenderTransformOrigin="0.5,0.5"/>