You could see it in the album cover.
There were very few Tom Petty and The Heartbreakers albums that even attempted to feature the entire band on the cover, and only two that truly succeeded. But if you looked closely enough, you could see the entire story of the band in those covers.
The first cover to feature the entire band was their second album, 1978’s You’re Gonna Get It! That cover depicted the band as bunch of serious young dudes — with their calm and confident leader right in the middle who were were clearly focused on a single thing: conquering the entire world.