I need to display several items from another list in the same site inside the form, and am using the online new responsive designer. For some context, it is an incident list that needs to have one or more "Actions" assigned but they want to manage the Actions as a separate list (for several reasons) so I can't use a repeating section and several fields. 

In the perfect world I could automatically link the actions to the ID of the current Incident item, although that's more a workflow question that I an investigating. So will settle for them manually creating the actions and linking them via a lookup list back to the Incidents list. 

But the real need is to display those actions within a page on the form so they can see all the related data together. I have seen articles about a display list control but that is only for on-premise forms I believe.