How do I add a document to a V5 project that already has a counterparty but no documents?

1. Open the project and confirm that "Counterparty" under "Project Information" on the right is the customer you want to manage. 2. Click "Link a document" in the empty document area in the center or in the "Milestones" section on the right. 3. Follow the subsequent screens to select an existing document to link and add it to this project.