If you want the signature field to be optional, simply use the following format:
[Signer.SigStyle#.Optional]
And you can find the document used in the code from this link:
https://developer.esignlive.com/app/uploads/DocumentExtractionOptional_Signature.pdf
Refer to this document page for more information: https://docs.esignlive.com/content/c_integrator_s_guide/sdk/c_managing_documents/extraction.htm?Highlight=extraction#DocumentRate this Code Share