Two "Aggregation Node" with "Join Node" in Hana Studio(Graphical Editor) ?

Hi All,

I am new to HANA studio trying to model a dynamic join.  Could you please guide me how to get Two "Aggregation Node" in detail pane area? So I can apply a join between these Two Aggregation Node as shown in the below link.

SAP HANA: Using "Dynamic Join" in Calculation View (Graphical)

Thanks & regards

Vikram