Trying to overlay an inserted table over a background image on a Writer document, can’t seem to get rid of a ‘shadow’ of white at the bottom.

I’ve tried adjusting the borders, creating a shadow, but nothing seems to get it to go away. Any thoughts?
 
      
    Trying to overlay an inserted table over a background image on a Writer document, can’t seem to get rid of a ‘shadow’ of white at the bottom.

I’ve tried adjusting the borders, creating a shadow, but nothing seems to get it to go away. Any thoughts?
Choose menu View and deselect Table Boundaries.
If you see a Print Preview of the document (menu File) borders should not appear.
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