Work with Model view in Power BI Desktop
Model view shows all of the tables, columns, and relationships in your model. This view can be especially helpful when your model has complex relationships between many tables.
Select the Model icon near the side of the window to see a view of the existing model. Hover your cursor over a relationship line to show the columns that are used.
In the figure, the Stores table has a StoreKey column that’s related to the Sales table, which also has a StoreKey column. The two tables have a Many to One (*:1) relationship. An arrow in the middle of the line shows the direction of the filter context flow. The double arrows mean the cross-filter direction is set to Both.
You can double-click a relationship to open it in the Edit Relationship dialog box. To learn more about relationships, see Create and manage relationships in Power BI Desktop.