Feature suggestion: Add possibility to add metadata as watermark to the photo and video

It may be interesting to have some metadata as watermark like date, time, GPS etc. A similar app with this feature is Timestamp Camera, available at Google Play Store.

A use case is when an image is inserted on a large PDF document and the watermarks may help to contextualize the text around the image. This feature is only to add convenience on large documents and validity of the media can only be attested by means already available into ProofMode App, of course.