The list of examples lists Adding Image Stamp, Adding TextStamp, Adding Pdf Stamp but there are no examples
Thanks for your inquiry. We have noticed that the Stamp examples listed over GitHub are missing in examples DashBoard. We have logged a ticket SUPPORT-7556 for its fix and will notify you as soon as it is resolved. However, meanwhile you can check sample code snippet/details for adding Stamp/Watermark in a PDF document from following documentation link. It will help you to accomplish the task.
We are sorry for the inconvenience caused.