Software Users Manual - English
Page 148
... choose Paper Thickness from Regular, Thick and Envelope. Bi-Directional Printing When Bi-Directional Printing is not available for Ledger or A3 size paper. When unchecked, the print head will only print in both directions offering faster print speeds. Note (For MFC-J5910DW) Duplex 1 (Slower print speed) is checked, the print head prints in one direction giving higher quality printouts...
... choose Paper Thickness from Regular, Thick and Envelope. Bi-Directional Printing When Bi-Directional Printing is not available for Ledger or A3 size paper. When unchecked, the print head will only print in both directions offering faster print speeds. Note (For MFC-J5910DW) Duplex 1 (Slower print speed) is checked, the print head prints in one direction giving higher quality printouts...