1. Check the printer settings to make sure they are set to the correct page size.
2. Make sure the document being printed has the correct page size set in the software and that it matches the selected printer settings.
3. Check the paper tray in the printer to make sure it contains paper that is the same size as the page size in the software.
4. Check the printer driver software and make sure the printer is set to the correct page size.
5. Restart the printer and the software to ensure all settings are correctly communicated.