Design for a phone screen
Most thumbnails are seen at the size of a thumbnail — a few centimetres across on a phone. Anything that isn't big, bright and simple disappears. That's why good thumbnails use one subject, few words and strong contrast.
Test variants, not just prompts
Because the preset makes four variants at once, you can compare framing and text placement side by side. Pick the one that still reads when you shrink it, and keep its prompt and seed for the next video to build a consistent channel look.
