title: Making a Digital Signature field Read only
body: <p>I am designing a form in AEM designer 6.3 where are 3 digital Signature fields in sequence 1,2,3. Initially when form loads, fields 2 and 3 are locked. 2 gets unlocked only when  field is digitally signed. In similar manner 3 gets unlocked only after 2 gets signed. </p>
  
  <p>Am not able to lock signature fields. I have tried with following codes:</p>
  
  <p>field.access = "protected"
  field.readonly = true</p>