Adding a PDF document to Display 5 is very simple. The PDF document will upload to the Display 5 server so that it is locally cached.
You can enter the slide title and a background color and then browse to the PDF file that you want to show. A powerful feature of the PDF widget is that you can specify the actual Page in the PDF doc that you want to show. So if you wanted to show more than one page you could create several PDF widgets that show each page of the PDF file that you want to display. Set a duration and optionally, schedule this slide as well.