Add a watermark before publishing a .pdf

So i have a busted corel draw-It will no longer export to .jpg  Corel Corp has said that since it's three years old, they no longer support it.

 So when I would email layouts to customers I would export the draw to .jpg and then insert it in the email. Cant make film out that!!

So I want to protect our intellectual property when I send layouts. How do I insert some kind of watermark so my draws  cant be stolen?

Do I make sense?

and for shame on Corel for not supporting your expensive bought and paid for software that  is only three years old