How can my students record their own line readings without erasing the existing professional audio?

Create a new show file for each student, so they can record their own line readings without losing the professional audio in the default show. To do this, go to the Settings tab and then tap "Current Show." This will take you to the "Load Show" screen where you'll tap "Load copy of original show." You can name this show anything you want to differentiate it from the default show. Tap "Done" and you'll see that a new show file has been created.