 When the Beatles re-signed with EMI in January 1967, their contract stipulated that Capitol could no longer alter the track listings of their albums.The cover for "Revolver" was created by German-born bassist and artist Klaus Voormann, one of the Beatles' oldest friends from their time in Hamburg during the early 1960s.Voormann's artwork was part line drawing and part collage, using photographs mostly taken over 1964–65 by Robert Freeman.