BAPACop

I have a three-monitor setup but, due to limited desk space, the one in the middle is a 4:3 monitor while the other two are 16:9. In the options menu there's a "Correct aspect ratio on secondary monitors" option, but as far as I can tell it doesn't actually do anything, as whether it is on or off the image on the 4:3 screen is squashed to fit. For the one 4:3 video I have, it appears on the 16:9 monitor with proper black bars on the side and still is squished somehow on

Thanks. I had tried Ctrl+A selecting but never tried individually. New question: I'm using multiple monitors. Is there a way to have each monitor display a different image in the slideshow? When I have more than one image selected the options to apply to individual monitors disappear and I'm just left with "Apply to all my monitors", and the images on both screens always match.

It's such a simple option that I must be missing it: How do I specify a number of backgrounds and have them change on a set interval?