<p>I think after a while you just get to know that if a font looks good during the service, that slides using that theme will be OK, even if it looks a little off during the design phase. The issue isn't actually the resolution, it's the shape. 1920 x 1080 has a screen shape of roughly 16:9 where as your projector has a screen shape closer to 4:3. There is a way of doing it though, if you go into settings, configure openlp, the section on monitors select override display position, leave X and Y the way they are, type in width 1024 and height 768. This will show you a window on your display that is the right size and shape. </p>