Embedded Add button for ref rows in a form?

[James_Rowe]

Hi, I’m using the Order Capture sample app as a template for an order management app I’m building. I’ve got everything setup and working except the ability to add products to my order. I’ve been stumped for a couple of hours trying to get the “Add” button to appear like in the image below. For some reason I can’t even get the REF_ROWS virtual column to show in the form, let alone see the related action button. Any suggestions?

Desired Behavior - Order Details

Current Form View - Order Details Not Displaying