Reference data is used in many places to provide content for drop-down list boxes. Setting up a project often involves setting up the base set of reference types to use. Reference data options can be set up from the Settings menu, including:
Having set up the reference data in a project, you can also export and import it between projects.
In the Corporate, Business and Software Engineering, System Engineering and Ultimate editions of Enterprise Architect, if security is enabled you must have Manage Reference Data - Update permission to update and delete reference items.