PDF files offer various advantages over Word files, particularly in terms of copyright protection. When you add a copyright watermark to your PDF files, sharing becomes secure, eliminating concerns about copyright theft. In this article, Software Tips provides instructions on how to add a copyright watermark to PDF files.

1. Utilize A-PDF Watermark Software
A-PDF Watermark stands out as the most versatile copyright watermarking software. You have numerous options, including watermarking with images or text.
Download Link: [A-PDF Watermark](http://www.a-pdf.com/watermark/download.htm)
Step 1: Download the A-PDF Watermark software to your computer and launch it for use.
Step 2: Choose the Open PDF icon to open the PDF file you want to watermark.

Step 3: A-PDF Watermark provides a variety of pre-designed watermark templates. If you prefer simplicity, choose a template and double-click to customize the information.
If you desire a more advanced Watermark, select the plus icon and choose from various modes:
- New Text Watermark: Add a new text stamp
- New Dynamic Datetime Watermark: Add a new date and time stamp
- New Image Watermark: Add a new image stamp
- New PDF Watermark: Add a new PDF stamp
- New Sharp Watermark: Add a new geometric stamp

Step 4: In this tutorial, Software Tips will choose New Text Watermark. For other modes, follow similar steps. Pay attention to these three areas:
- Content of the stamped text
- Font, color, text format, size
- Position of the Watermark stamp
After setting up, preview your changes on the right window. Once satisfied, click OK to save.

Step 5: Then, press the Watermark button to let the software automatically apply the watermark to the PDF file.

And here is the result after applying the watermark using A-PDF Watermark.

2. Use Online Web-based Software
If you're not keen on downloading additional software to your computer, you can opt for online tools capable of adding watermarks. In this article, Software Tips will introduce you to the Sejda software.
Homepage: https://www.sejda.com/en/watermark-pdf
Step 1: Visit the Sejda homepage to get started. Then, select Upload PDF file.

Step 2: Next, choose the PDF file you want to watermark from your computer and click Open.

Step 3: After that, the PDF file will open. At this point, you have two choices.
- Add Text Watermark
- Add Image Watermark

In this article, Software Tips will opt for adding an image watermark. For adding a text watermark, you can follow a similar process! Instead of selecting an image, you just need to type the text for the watermark.
Step 4: Now, select the Watermark image you want to add on your computer.

Step 5: Afterward, the Watermark image will open, and you can choose Recenter to adjust the position and angle.

Step 6: Next, adjust the Opacity to customize the intensity of the Watermark.

Step 7: Then, press Enter. The software will automatically process and provide a link to download the watermarked PDF file to your computer. Click Download to save the watermarked PDF to your computer.

And here is our result after adding the watermark.

In this article, Software Tips has guided you on the quickest and most aesthetically pleasing way to add a Watermark to your PDF file. Wishing you all success!