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Read information from signature lines
To read information about signature lines of OpenXML documents you need to use TElOfficeOpenXMLDocument.SignatureLineCount property to get the number of signature lines, then use TElOfficeOpenXMLDocument.SignatureLines[] property, which returns TElOfficeOpenXMLSignatureLine object. Then you can use its properties such as SuggestedSigner, SuggestedSignerEmail, SigningInstructions, AdditionalSignatureInfo etc. to get the information about this signature line.
