"Incident Report" setting for Document Engine

Hello, We are running an on-premise instance of your version 6.5 product. In your release notes you state the following:

The PDF Document Engine added an Incident Report setting that will cache request information for debugging purposes.

How do I enable this? I searched the documentation and the admin pages and couldn't find anything, but perhaps I am looking in the wrong place. We are trying to figure out what is going on with an XSLT process of ours and believe something like this would be helpful, especially if it allows us to see the full request coming into our Document Engine instances.