MFC-8840D FAQs & Troubleshooting MFC-8840D Not your product? Sort by: Updated Date Popularity 2 Results 1. 03/17/2023 Open the "Scanners and Cameras" and Properties. 2. 04/01/2016 I'm using Macintosh. What is the PreScan option used for? Scan FAQs & Troubleshooting