Project List is on a very simple page. It shows a preview of all your active projects, so you can see what design will be printed and how many cards are in the project. Click on a project to open the Card List section. Users with Administrator role see all active projects, while others will see the project only if they have the privilege checked in the Users / Edit User section. Inactive or trashed projects will not show up. Using the roles and privileges, you can set a project to active to see it in Producer, but only visible to you for testing purposes.