Aside from his well-documented stance against licensing Calvin and Hobbes, Watterson also clashed with Universal over their mandated Sunday strip format. He became frustrated by the lack of newspaper space and mandatory panel divisions, wanting the same artistic freedom classic comics like Krazy Kat had. Some said his grievances were out of arrogance, while others supported him. By 1991, Watterson was able to negotiate more creative control over the layout of his comic strip.