Is your resume in Word format? How do you do the watermarking operation? Write it out and let's see what's wrong.

Supplement:

I know why. It's not that the watermark is invisible. It is estimated that your watermark picture is a little small and displayed at the bottom of the page, so you think there is no watermark under the desk. If you want to have a watermark under the table. You can make the picture bigger and add it to get the result you want. You try.