问题
After adding the text watermark and clicking on the PDF, Acrobat reader will display a large blinking cursor that looks more like a rendering artifact or start selecting the watermark text.
Can the watermark text be made non-selectable?
The watermark is a large "Draft" text under the existing content: using c# itextsharp PDF creation with watermark on each page
回答1:
To my knowledge there is no way to make text non-selectable.
As an alternative to the large blinking cursor you may instead put an image of your watermark on the PDF. This would instead give a small cross-hair cursor when you mouse over the watermark image.
Example: How can I insert an image with iTextSharp in an existing PDF?
来源：https://stackoverflow.com/questions/10338592/create-non-selectable-text-watermark-in-pdf