What is PCL XL, and why is it important for HP printers?

PCL XL (Printer Command Language eXtended) is a page description language used by HP and other printer manufacturers. It's a more advanced version of PCL, offering features like enhanced graphics support, better font handling, and improved print quality. HP printers often default to PCL XL, and understanding it is crucial for troubleshooting print-related errors like the one you're experiencing.