Use PDF watermark software to protect you PDF file

Our company sell EL product, as few people know what is EL product, so I did a PDF file to introduction our products, and put these PDF file in our website, it cost me much time, but the effect is very good. But one day, one of our client said another el company also sent that PDF file to him, that PDF file is basically the same as ours, just change company name and contact info.I’m very angry! I cost so much time! But they! I need protect my PDF file copyright.

How to protect PDF file? I think add watermark to pdf file or stamp watermark is a good way, I find Star PDF Watermark for Mac software, it’s a PDF watermark for mac,as it have free version, so I use this PDF watermark software on Mac OS X, I try 5days, I find it’s easy to use., so I bought it, free version only can add text to pdf, but purchased version, not only can add text to pdf file, but also can add image to pdf file, the best I like is I have 3 choices, add watermark on all pages of pdf file, or add watermark on odd pages of pdf file or add watermark on even pages of pdf file. I also can use this water mark software batch stamp watermark to pdf files.

Now I add watermark to all of our PDF files, everything is ok!