Tap Tools and click Stamp icon. You can see three types of stamps including Standard, Dynamic and Custom.
1. In Standard mode, choose the stamp you need, and put it to where it should be;
2. In Dynamic mode, the operation method is the same as above, which shows when the stamp is created;
3. In custom mode, select Image Stamp, and add an image from a file. Or click Text Stamp, choose a text style and enter the text on the input box. Finally put the stamp to where it should be.