Slideshow Issue/Question

I use the Personalization>Lockscreen>Slideshow option. I like this feature and the way it transitions and displays multiple images in random patterns. My only beef is that most (if not all) the images are cropped. I can live with the slow 'zoom' feature that it incorporates, but would prefer that each image would initially display uncropped. If there is no solution for me does MS have a wishlist/enhancement request page/website?

Finally, I would be open to a 3rd-party (free I hope) that performs in the exact same way as the W10 slideshow but with additional settings that would resolve this cropping issue.

-thx