If you wish to disable or enable the dark overlay on cover items it is easily doable within the tool.
- Navigate to Titles
- Click 'Layout'
- Under 'Options', select or deselect the 'Dim Interactive Items' checkbox.
Enabling this overlay is helpful in some instances. It focuses the viewers attention on what the curser is currently hovering over.
If you wish, you can also have this disabled. This could be the best option if you want the viewer to clearly see all items on the cover at all times.