MFC-790CW FAQs & Troubleshooting MFC-790CW Not your product? Sort by: Updated Date Popularity 4 Results 1. 11/19/2014 How do I load envelopes into my machine? 2. 08/31/2012 Load legal size paper in the paper tray. 3. 04/26/2012 Load paper in the paper tray 4. 06/03/2010 How do I know which side up my photo paper should be in the tray? Paper Feed / Paper Jam FAQs & Troubleshooting