In the application, you can add a watermark to the Pdf document.
You can create a watermark from text or an image. Each method supports several settings.

Text watermark:
-Sign text
-Colour
-Text size
-Opacity
-Location

Watermark from image:
-Selecting a picture from the device
-Opacity
-Sign size
-Location.

At any time, you can view the preview of the document. So you don't have to save the pdf every time to see how the sign will look on your document. The first page of the document is taken for the preview.

After working with a pdf document, you can save it to your device or send it in any available way.