Method 1:

1. First of all, please note that Adobe Reader is only a viewing tool and cannot modify PDF files. What we need is Adobe Acrobat PRO, which can be downloaded from Baidu!

2. Start the PDF document you want to watermark, as shown in the figure below! Click the document option in the menu bar;

3. On the document options page, select Watermark--Add;

4. First enter the text, that is, the watermark content, as well as the text size, color and Font information;

5. Then set the direction of text placement. You can customize any angle. In order not to affect reading, you can set the transparency;

6. Set the margin information of the watermark. ;

7. After the settings are completed, you can click to save the settings and call them directly next time!

8. Enter your watermark saving name and click the OK button;

9. Save successfully, click the OK button below to complete!

Method 2: Add watermark to pdf (Qihao PDF batch watermarking tool) V2.0.1 Chinese green version

Step 1: Add PDF files through the [Add File] button or Directly drag PDF files from outside into the program interface.

Step 2: Set watermark parameters. The program can set two types of watermarks: text watermarks and picture watermarks.

Step 3: Click the [Add Watermark] button to add a watermark to your document. The watermarked file will not overwrite your original file, but will regenerate a new PDF file with the naming rule MK_original file name.

Method 3: Easily add PDF watermark - A-PDF Watermark 4.7.6 Green Portable Edition