A project's data is stored in a link set and can be viewed in the Links tab of the Project Explorer dialog. Link sets can contain links to documentation related to the project.

Once a link set is created you can open it, browse through its links, open links, add links to elements, add links to detailing symbols, and view the properties of links and folders.

You can add links to elements either on-the-fly without creating a link set or by using Project Explorer to create a link set.