cannot lock document after digital signing in adobe
Otherwise, you can place a digital signature on your scanned pages or other PDF documents by choosing âPlace signatureâ from that same âSignâ task bar button. Just before proceeding with signing the document, Acrobat 9 Standard may first switch into âsignature preview modeâ. This temporarily âlocks downâ the document and Acrobat 9 so that further changes cannot be made and you can see exactly what you are signing.