This is used as the filename when you save or export the project.
This will generate a PNG image of your drawing and download it to your computer. You can use this to share or print your work.
This will generate a JSON data file and download it to your computer. Not very useful by itself, but it will allow you to import it later to make additional changes.
This will let you upload a JSON data file that you previously exported, in order to continue working on it.