Anton Shields remembers managing the projection booth at Hollywood Cinemas. Hired 20 years ago to help open what was then a brand-new 14-auditorium theater, Shields worked his way up from ticket-tearing usher to the man in the big room above, running the movies. Threading shiny strips of celluloid through the projector’s platter — a reel system widely used at the time — Shields also ensured the film was framed correctly, that the lights dimmed as the previews rolled and that the sound was just right.