When the recordings were ready to be mastered, Lennon and McCartney spent forty-eight hours at Abbey Road Studios, working out the running order for the songs on the album. They took stimulant drugs to help them get through the marathon session. The band had done photo sessions during the year, but could not agree on any photos to use for the cover. They decided to go with a plain white cover, which had never been done before. They and their helpers made a collage of different photos, which was included as a poster with the album. Portrait photos of each member were also taken. Black-and-white prints appeared next to the song titles on the inner jacket, and colour prints were included with the poster. They did not appear together in the pictures, and this was taken later as a sign that the band was growing apart.