It's probably because you have it within the cell of a dynamic layout.
Drag the same section into the outer level of the section, and you should see the options now. But to make full use of this feature, you will add a collapsible header or put this into a tabbed layout for the defer load to be advantageous.
The Defer Load is in two places - Layout properties & Section include properties. The one in the Layout properties is immediately available while the one in the section include properties only appears when we select Caption as Header & uncheck the Expanded on Load checkbox.
Is checking the Defer load on the layout sufficient to make the non blocking UI work? Or does it have to be on the section rule? I am using 7.1.9 BTW.
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