How to add Watermark in exported pdf file

Hi @David.Xu,

How is your question different than the one, which you also checked and responded to?
Duplicating questions on the forum doesn’t guarantee a faster or a better answer.
Please follow the other topic and when someone with knowledge on the topic will answer, you will know.
Please keep in mind that the XWiki experts are answering to the forum questions in their free time.

Thanks,
Alex