How to extract Preview's signatures for use in other applications - CNET
Apple's Preview program in OS X is great for capturing signatures, but by default these can only be used with Preview; however, there is a workaround to extract and them for use elsewhere.
Attach, push, and pull supply chain artifacts - Azure Container
Preview User Guide for Mac - Apple Support
signNow .NET SDK fundamentals - signNow Blog
Digitally Sign and Verify Signatures in PDF Files Using C#: A
How-to: Use Preview to put signatures on PDF's, Pages Documents
Open and Save PDF Documents in .NET MAUI
signNow .NET SDK fundamentals - signNow Blog
Evaluation version
Getting Started with EJ2 ASP.NET Core PDF Viewer Control