Start by creating an account. Head back here once you are signed in.
Use the list on this page or head to volumes to find a set of maps to work on. Once you select a volume, you will find yourself at the volume summary page.
In the volume summary you can load the map sheets into the database. Once loaded, you will see all of the sheets in the "unprepared" list.
If someone else has already loaded the volume, then just pick a sheet to start working with it.
In this application, the entire georeferencing process comprises three sequential steps, each with its own tool interface:
Learn more in the documentation: