How to create more backgrounds

You can add a background to a puppet and assign a trigger to it. Look at the ppuetmaker files for inspiration. The file I looked at (Edit Original) had the background at 1920 x 1090. Or, you can create your own image and import it separately, adding it to the timeline. If you do that, you will need to simply turn them on or off when needed in the timeline. This has the added bonus of allowing you to scale the background independently of the puppet.