MFC-8420 FAQs & Troubleshooting MFC-8420 Not your product? Sort by: Updated Date Popularity 3 Results 1. 06/01/2023 Delete print jobs from the print queue. 2. 03/27/2023 Change the printer driver settings (Windows/macOS) 3. 09/22/2011 Where is the Manual 2-sided(Duplex) setting option in the Mac OS X 10.3 driver ? Print FAQs & Troubleshooting