2.2.2.6 Download attachment PDF with watermark

When “Download attachment PDF with watermark“ is enabled (by default), downloading PDF attachments will be watermarked.

If "Use different watermark style when downloading PDF attachment" is turned on, the PDF attachments watermark will follow the additional settings; if it is turned off, it is consistent with the page watermark. ( 2.2.2.8 Use different watermark style when previewing attachment, exporting page and downloading PDF attachment )

Example:

Downloaded PDF attachment