Can I change the project area of an existing project?
You cannot change the project area of an existing project. You can, however, create a new project with a different project area.
If you're seeking to make minor changes to exclude features from an existing project area -- for example, parcels that are included because they touch the project area boundary, yet fall outside the jurisdiction that you're working in -- you can remove them from the Base Canvas. For more information, see How to Remove Features from the Base Canvas.