Hello,

Great v5 article using activities 

https://pdn.pega.com/user-interface/how-to-configure-cascading-dynamic-select-controls

Great v6 article using report definition

https://pdn.pega.com/user-interface/how-to-configure-a-dynamic-select-control-using-a-report-definition-rule

In Pega7 dynamic select is deprecated and you should consider using a "dropdown" or "autocomplete" control.  The UI gallery in designer studio has many great examples.

The only difference for a repeating layout is you are setting the control in the cell in the repeating layout.  You will configure the control the same way in any location in the section rule.

Regards,

Tara

Pega Academy Support Team