I'd like to know the difference between the professional titles "writer" and "screenwriter" in the context of movies. Please notice that I'm not a native English speaker and I have little knowledge of cinematographic terminology. As far as I understand:
- The "writer" creates the "story" of a movie, the plot.
- The "screenwriter" works on the "screenplay", the dialogues.
But I'd like to be sure one does not mistake "writer" for those who write books instead of films.