To open the Warehouse Source Table notebook :
From the Data Warehouse Center window, expand the Sources folder until you find the Tables folder for the warehouse source that you want to work with.
If you are defining a new warehouse source table, right-click the Tables folder and select Define. The Define Warehouse Source table notebook opens.
If you are changing an existing warehouse source table, click the Tables folder. Any existing warehouse tables are displayed in the pane on the right side of the window (the contents pane). In the contents pane, right-click the warehouse source table that you want and select Properties from the pop-up menu. The properties notebook for that table opens.