FAX-5750e FAQs & Troubleshooting FAX-5750e Not your product? Sort by: Updated Date Popularity 1 Results 1. 03/16/2006 I installed the LT-400 optional tray. I use letter size paper in Paper Tray #1 and legal size paper in Paper Tray #2 (LT-400). How do I program the Brother machine to select the correct paper tray when copying a legal size document? Copy FAQs & Troubleshooting