This article gives you an overview of how to use the PDF Editor and add editable fields to a PDF template. This lets you add custom data after a PDF is already generated. For example, you could add extra shipping information (a truck number) or name and a signature on the PDF.
How to add editable fields
Open the editor (see here)
Create a new field or select an existing data field
Open the "advanced" tab in the right sidebar and select "Render as an editable Field"
4. Now when this PDF is generated from Katana it's possible to fill in the required text on the PDF.