Lexmark CX421
Load an original document into the ADF tray or on the scanner glass.
From the control panel, navigate to:
Copy > Settings > Pages Per Side
For non-touch-screen printer models, press to navigate through the settings.
Adjust the settings.
Copy the document.
Learn how to copy two or more cards on your printer.
Copy two original pages onto both sides of a single sheet of paper to reduce paper and energy consumption.