What does an art editor do? What about TV and movie editors? Can someone who studies advertising design become an art editor?

Art editing is the general term for media art editors.

Art editing is the art work that cooperates with copy editing, newspapers and magazines, book binding, and web page art design. Work content; illustration, layout, cover, photography design, etc.

TV movies; the types are too wide, including TV commercials, TV columns, TV series, documentaries, and dynamic-based programs are generally called art productions.

Of course those who study advertising design can do art editing work. Where there is a will, there is a way.