You can view the document signers in two ways:

  1. From the documents page, you can click on the options button for that specific document, then viewing the Signers details, when find the list of Signers and CCed users. You can also resend the signature requests for the pending signatures. 
  2. From the documents page, you can click on the options button for that specific document, then you can view the audit trail of the document. In the audit trail, you can view all the details of the document including the document signers.