That, to me, is an oversight of the marketing team not updating the website from the previous year.  This question had been before and Intuit confirmed each time to the users that it's not possible - unless, of course, something has changed.  FWIW, here's the article about eSignature and its limitations:

https://proconnect.intuit.com/community/manage-integrations/help/intuit-esignature-faqs-resource-gui...

Please let us know what you find out from Intuit next week.

Cheers!