Tracy, sorry wasn't able to respond as I wanted to make sure I had the latest version.  Using v2.0.49 the issue still persists. I have an image on the page, I drag over a view, I then drag a context dimension up from the view on top of the image.  The selector is not reachable as it's covered by the image EVEN THOUGH the image's Order value is set to 1.  The attached screenshot shows this setup.  I set the image's opacity to 25 so that you could see the selector hiding behind.  I'm curious how you were able to make this work?