Once you've finished Capturing on your Project - you can now mark it as Complete and view it in the new Completed tab from your Project list:
Projects in this state are still viewable, but you will no longer be able to add Captures or field notes. Warnings and Notifications that the site hasn’t been walked recently will no longer appear.
From the Projects page, hover over your Project and click "Project Settings".
Click on the three dots in the top right-hand corner, then click "Mark As Complete"
NOTE: Once a Project has been marked as complete - you can always view it at a later date under the Completed tab.
If you would like to receive an offline version of your Project, find out how to obtain an Offline Deliverable here.