Media is changed easily throughout printing, but best to keep unused media in the original box. Always store away from dust. Some newer printer support rollback technology which allows multiple print sizes (usually 8×6″ and 6×4″) to be printed for 6×8″ media. All without wastage. Even printer without this technology can usually still print 6×4″ photos from 6×8″or 6×9″ print media.