I believe you're running PracticeWorks, whereas the original poster is running SoftDent. In PracticeWorks you can add PDF's (and many other file types) to the chart using the Attachment button. Sorry for the confusion.
I realized after i read further and saw the thread in my feed. Am I not seeing in the exchange how to filter only seeing discussions for my software? I would prefer to stay only in PW subjects. Also is there a KDI thread? I chose PW in my original setup, but i still see posts from all the different groups.