 <p>This gets the job done visually:</p> <pre><code>&lt;Grid&gt; &lt;Image Source="{Binding MyImage}" /&gt; &lt;Image Source="{Binding MyWatermark}" /&gt; &lt;/Grid&gt; </code></pre> <p>Same answer as here: <a href="http://stackoverflow.com/a/14509282/265706">http://stackoverflow.com/a/14509282/265706</a></p>