Editing Fancy Box Product Zoom

[pinwheel]

Hello,

Prestashop 1.7.6. 

I have searched high and low, without any success. 

When zooming on a product, it opens a large box that has images going down the sides of it. Each time you click on one of those images, then that picture becomes the big one. Problem is you can see the background, when the images are black and the background is black, it does not not look good. 

How can you make the fancy box only have one image and not the side images? You have arrows if you want to see more images. Any help would be much appreciated.