1. Tap  on the toolbar;

2. Select Standard, and you will get an ordinary stamp;

3. Select Custom to create a customized Image Stamp or Text Stamp;

4. Select Dynamic to create a dynamic stamp consisting of an author and a date;

 5. Then click an area you want to add a stamp;

6. To remove the stamp, right click the stamp in the text and select Delete;

7. If you want to add the same stamp on different places, just right click and choose Copy, then Paste to other places.