How Can I Double-Side Print?
  1. Click on File > Print
  2. In the printer list, choose the HP 4650-Lab B
  3. Click where it says Copies & Pages and choose Layout
  4. Near the bottom of the window where it says Two-Sided, change it from Off to:
    Long-edged binding (for portrait)
    Shor-edged binding (for landscape)
  5. Print