Currently when an image is previews, there is a shading applied to the top and bottom of the image, and this can be detrimental to the experience and efficiency of the functionality. For example, when dealing with screenshots form customers, it is common that a at the top there will be a URL and the shading gets in the way.:

It is possible to move your cursor away from the image preview, wait for 3 seconds and the shades go away, but having to do this for every image is not efficient.

There are a few ways this could be tackled:

• Remove the shading entirely.
  • If some indicator or reminder that this is a preview is needed, maybe replace it with something that doesn't get in the way of the image entirely.
• Keep the shading but make them disappear as soon as the mouse pointer is no longer over the image (removing the 3 second delay)