I can't seem to find a way to make the image fill the whole window while in the slideshow mode if the image is smaller than the window.

you'd think "fill" setting would enlarge the smaller image to automatically fill the window and "autofit each image" option would apply that "fill" setting to each image in the slideshow.

am I missing something? or is it simply not possible? I'm trying to have a slideshow running in full screen with each image automatically filling the screen/window with it's largest dimension matching height or width of the screen.