In physical model you can define Data Warehouse Type for your tables and graphically distinguish the Fact and Dimension tables.
Example:

tdm-img-234.png-550x0

By default, the Data Warehouse options are not available and must be activated in Settings. 
Standard Entity Properties form:

tdm-img-231.png-550x0

To display Data Warehouse Type options click Settings | Options and in section Physical Model enable the checkbox in group box Form Settings.

tdm-img-232.png-550x0

To set Data Warehouse Type then choose Dimension or Fact value from the Data Warehouse Type combo box.

tdm-img-233.png-550x0

Good luck! 

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