I'm using Apose.Slide 126.96.36.199. I have a problem with setting a background image to a slide. The image is streched to horizontal and vertical of the slide. So the background looks very ugly. Can you tell me the slide's size in pixel? I got a slide's size by Presentation.SlideSize and the result is 4320 in height and 5760 in width, does it is pixel? I use OnScreen Presentation.SlideSizeType.