Once you create a Photo Album, notice that the default template for Photo Album is a black background with white text. You can go ahead and use this template – but you can easily change the appearance of the slides by applying a Theme to your Photo Album presentation. You can of course do it outside the Photo Album presentation — in the normal way that you apply a Theme. But you can also apply a Theme right within the Photo Album dialog box.
Learn how to apply a Theme to your Photo Album presentation in PowerPoint 2013 for Windows.

