what do markers do in imovie?
I'm working on a long project in iMovie 10.1.9, and I see there's an option to add "markers" to a project. This would make navigating the project a lot easier, but I don't see how they actually work. Documentation is spotty at best--basically just "you can add markers". Can I label a marker with "Chapter 2", for instance? How do I quickly navigate to a marker in a project? I'm doing a lot of scrolling back and forth to find points in a project, and it would be a lot easier if markers could help.
MacBook Pro with Retina display, macOS High Sierra (10.13.3)