Press space to advance. It's like a slideshow. Unfortunately, I don't expect Scratch to move to 16:9 soon, or ever. It'll probably break most projects, which are designed for 4:3. But who knows? Some other notes: (sorry for wall of text) > Your computer might also use 16:10 if it's newer, like the 2020 Dell XPS 13. Seems pretty weird though. > Another common aspect ratio is 19:9, used by most newer smartphones. I don't really like it, because you get black bars when watching almost everything. > Wider ratios tend to work better in video because our vision is wide. However, 4:3 works better in photo since you might want to shoot potrait rather than landscape. Tall photos don't work well. > It's still best to take photos in 4:3 and then crop them down later.