1. Watch a movie (preferably in a non distracting surrounding such as a cinema).
  2. „Start“ at the companion app on your Apple Watch.
  3. „Stop“ at end of movie – now your record pops up in the iOS app.
  4. Search for the appropriate title and save.
  5. Rotate to landscape to see the graph full screen.

You may not know: Exported graphs are available in the documents folder via connecting your phone with the iTunes application.