PDF Watermark for printing only, programmatically

Question

I can watermark any PDF already, and the images inside, everything ok, but now I need the watermark only showing up when the PDF is printed... Is this possible? How?

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Answer 1

The bOnScreen parameter determines whether the watermark will be displayed when the PDF is viewed on the computer screen, and bOnPrint determines whether it will be displayed when the PDF is printed.

-- https://acrobatusers.com/tutorials/watermarking-a-pdf-with-javascript