Example of Form Designer in ASP.NET Core PDF Viewer Control
This sample demonstrates the creation of the supported Form fields in the PDF Viewer such as Textbox, Password, Checkbox, Radio Button, Drop Down, List box, Signature, and Initial. We can also customize these fields and can include new fields through the user interaction by switching to the designer mode.
DEMO
SOURCE
More information on the PDF Viewer instantiation can be found in this documentation section.