Open the document you want to print
Click File
Click Print
Select your printer
Look for a Two-Sided or Duplex option
Check the Two-Sided box
Choose Long-Edge binding or Short-Edge binding if available
Click Print
If Two-Sided is not available, click the printer settings menu and look for Layout or Finishing
If your printer does not support duplex printing, print odd pages first, then reload the pages and print even pages manually