A creative watermark can express people much. This article tells you how to add watermark to PDF.

1. How to add watermark to PDF
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2. A PDF with watermark shows people who make this PDF and it
can increase brand awareness. A creative watermark can express
people much. This article tells you how to add watermark to PDF.

3. 1. Install Foxit Reader on your PC
Foxit Reader is a excellent and light PDF reader. You can use it to
add watermark to PDF easily. Visit www.foxitsoftware.com to
download the latest Foxit Reader.

4. 2. Add watermark to PDF
Open the PDF with Foxit Reader. You can right click the PDF and
choose “Open with”. Once you open the PDF file, click “PDF Sign”
option to add watermark.

6. Choose “Create Signature” – “Import Image”. Select a image on
your PC and click “OK” to confirm. You can now preview the
watermark on the page. Drag the red border of the watermark
to adjust the size

8. If you want to add the watermark on assigned pages, just right
click the watermark and choose “Place on multiple Pages”. Then
click “Apply Signature” and save the PDF. Now you’ve add the
watermark to PDF successfully.
Source: http://www.epubor.com/how-to-add-watermark-to-pdf.html