Add Watermark into PDF using the Letter Head on every page

Hello Community,

Does anyone know how to add a watermark to every page of a PDF using only the Letter Head feature in Frappe (without modifying the print format or using additional scripts)? I’m looking for a solution that works across all pages consistently, especially when generating PDFs via wkhtmltopdf.

Thanks in advance!

yes you can add this in the print style document it is linked with the print pdf just create a new custom class and add it in the print format it will add the watermarrk