I see now there is a new version of Nintex Forms Designer. I could not access it initially because of the new sites being blocked by our firewall, but after I got that resolved I saw the new designer.
It has a new Signature control, which I am glad to see, but the question is, "How do I use it?" I cannot find much documentation. There is 1 overview video I found (https://www.youtube.com/watch?v=ZTm07OFxhpE ) but it only mentions it briefly saying it will be stored in the list or in an image library, but how? When I open the control properties, under "Connected to" it does not allow me to connect it to anything. I tried the "Help" button but that only opens a generic help website with no obvious way to find anything.
Has anyone out there figured out how to get the signature control to save you image somewhere?
The signature is captured and stored as image attached to the item directly. To get access to the image, you would need to use the web service call via workflow to retrieve the attachments.
I've seen this request quite a few times and will work to update documentation with an example soon.
Aha, now I see the attachment! I had to modify the view and tell it to display "Attachments."
"Attachments" was always displayed by default on my old on-prem version of SharePoint, but not on SharePoint Online.
I should now be able to build a Nintex Workflow and use action Generate Document to get access to that signature.