Clip art replaces image

Many schools fill up the entire canves with photos leaving "0" blank space. The issue now is that if you try to add a clip-art element, it replaces an image rather than applying the clip-art over the image.  Is this caused by a bug to have clip-art replace images?  

Or a fix would be to have the option to "Apply to page" once you hoover over a clip-art element to replacing of image.