All content items in your account belong to a source. During import, you are asked whether you want to add content items to an existing source, or create a new source.
For every item on your portfolio, the source is displayed in the same line as the date and the content type:
You can change the name of the respective source by going to your Source settings at authory.com/app/settings/sources:
If you click on any source, it's settings will open up and you can change and then save the updated name:
