on Jane Friedman site:

Everyone knows about editors in movies. An editor takes footage from a film shoot and works with the director to cut multiple takes into a coherent picture. There’s an Academy Award for Best Film Editing, so names get known. Thelma Schoonmaker has won three Oscars, having edited all of Martin Scorsese’s movies since 1980.

But here’s something many people don’t realize. Thelma Schoonmaker is a picture editor. Well before a film is shot, a story editor works on the script with the writer, and probably the director and creative producer. If it’s a big-budget project, studio executives send notes. In the midst of all this noise, it’s the job of the story editor to help the screenwriter craft the best script possible, just as an editor in publishing helps a writer rewrite a manuscript.

I’m a novelist, but of course I’ve held paying jobs to support my literary habit. This includes editing books and story-editing screenplays, so I can tell you they’re very different beasts. When I’m doing a story edit, I take a visual approach. I edit books more intellectually.

Yet when I sat down recently to rewrite the first draft of my latest novel, I decided to pull out my story-editing chops. It was an experiment, but it worked, so I thought I’d pass on a few out-of-the-box editing tips.