Adding media sometimes has been an issue. I will upload an image and it will show up on the MAC I use, then it will not project onto the screen, it becomes a blank slide in Proclaim. I thought it was the size of the picture used so I resized it, it showed up for a while then went blank again. Any thoughts on dimensions of photos for Proclaim to ensure they show up on our screen? Our screen is a 16x9. Thanks!