Open the document you want to print
Press Ctrl+P or click Print
Select your printer
Open Printer Properties or Preferences
Find the Duplex, Two-Sided, or Double-Sided Printing option
Enable the duplex option
Choose Flip on long edge or Flip on short edge if available
Select the pages you want to print if needed
Click Print
If your printer does not support automatic duplexing, print odd pages first
Reinsert the printed pages as instructed by your printer
Print the even pages on the other side