1. Enter reading page -> Tools;
2. Select Stamp on the toolbar;
3. Choose Standard, and you will get an ordinary stamp; Or you can choose Dynamic to create a dynamic stamp consisting of an author and a date; Or you can choose Custom to create a customized Image Stamp or Text Stamp;
4. Then click the area you want to add a stamp;
5. To remove the stamp, right click and select Delete;
6. If you want to add the same stamp on different places, just right click and choose Copy or use Ctrl + C, then right click and choose Paste or use Ctrl + V.