Manga artists guide the eye with panel shape, contrast, and breathing room....

https://www.bookmark-help.win/a-manga-panel-guides-your-eye-a-mobile-casino-screen-should-do-the-same-this

Manga artists guide the eye with panel shape, contrast, and breathing room. Mobile casino screens face the same challenge: make the main action obvious, keep controls readable, and help text stand out on a small phone