Zoho creator workflow Issue

Zoho creator workflow Issue

Hi There,

I am trying to create a workflow to one of my inspection forms. The flow should be as follows;

The user creates a form and send it to the approver
Approver checks it and signs the form (or reject it)

From what I can see once the form is submitted to the approver, the approver can't sign on the actual form. Is this something you can incorporate to the form? 
Or once the form is approved, is there a log to show who signed the form and on what date?

Regards,

Lou