I have previously been able to email a PDF Portfolio to my iPad from my iMac and open it just fine. Evidently in some recent updates that can no longer be done. When I try to open the portfolio on the iPad a blank screen comes up. I can still open the portfolio when I send it to my iPhone like I have been able to do in the past on my iPad but not now. I can send the individual files to my iPad and save and open them there individually.