A Broadway Fixer, Keeping Theatergoers Safe and Comfortable | New York Theater: Charlie Copeland is a Broadway fixer, who’s worked on everything from “The Phantom of the Opera” to “Frozen,” tangibly changing the experience for a generation of theatergoers. Copeland is not a director or a writer. He hasn’t even attended some of the shows that he’s fixed. Copeland is an engineer, the president of Goldman Copeland, a…