Dark background on Adobe Porfolio

Hi

I don't know if this can me done but, I would love seeing the photos on my portfolio with a dark background everytime I click to visualize it, and I mean when you open a photo, not on the editor (you can there). 

Now when you are in your porfolio to see how a picture looks, the background of the thumbnails is dark. As soon as you click to zoom the photo, the background is white. It is a huge difference having a dark one and a white one.

Jose