Make sure you have a CRM Form Configuration and a TPC Form Layout attached and configured or else you won't see any fields for the widget.
Drag and drop the Signature Field from the Portal Connector tools into the TPC Form Layout and click edit to display the properties prompt.
The Title will allow you to set the label for the widget.
The File Name will allow you to specify the name of a signature image. Please note that you will have to include the “.png” extension.
The File Location will allow you to specify where a signature will be saved. Available options include saving a signature as a Note attached to a record or as a SharePoint Document attached to a record.
The Read Only
will not allow the user to interact with the widget when checked.
will not allow the user to submit the form until they've signed the widget.