I’m building a document acknowledgement system and the customer wants to show the document in the form with the form controls to acknowledge the document below it.  They would also like to the controls to only be turn on once the document has been scrolled through if possible.  I’ve looked here in the community board and can’t find an example.  Has anyone done something like this before? 

This is being built in Nintex for Office 365 using SharePoint Online.

Thanks in advance for any help.