Attributes and Labels can be shown on the entities in the Hierarchy Diagram. The  Hierarchy Diagram can show specific attributes on the entities of the Hierarchy Diagram as well as show all labels on the Entities. This Setting will be project specific between different Hierarchy Diagrams. 

Both are found in the Settings drop down on the right side of the Tool bar

For showing attributes click the ‘Show Attributes’ on the settings drop down. 

Once the Show Attributes modal pops up, Select which attributes would like to be shown on the chart.

Click Set

For showing labels click the ‘Show Labels’ on the settings drop down.