How to: Edit Conceptual Model Properties (Entity Data Model Tools)
The ADO.NET Entity Data Model Designer (Entity Designer) can expose conceptual model properties for viewing and modification. Modifying properties such as Entity Container Name or Namespace makes changes to the .edmx file, and affects classes generated from the .edmx file. For more information, see .edmx File Overview (Entity Framework) and Generated Code Overview (Entity Data Model Designer).
To edit conceptual model properties
Click an empty area of the design surface.
The conceptual model properties are displayed in the Properties window.
Make any changes in the Properties window.