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A digital signature (ID), like a conventional handwritten signature, identifies the person signing a document. Unlike a handwritten signature, a digital signature is difficult to forge because it contains encrypted information that is unique to the signer and easily verified. It is usually password protected and can be stored on your computer in PKCS #12 file format (PFX).

1. Choose  Document > Digital Signature...

2. Select a PFX file with digital signature.

3. The Create Digital Signature to Document dialog box comes up:

 

• Select a File:  Select a PFX file with digital signature.
• Enter Password: The password for the digital ID.
• Allow Multiple Signatures:  If checked, the signature and all the other content will be added as a new revision thus not invalidating existing signatures.
• Keystore Type: The specified keystore type. pkcs12 is the most common type.
• Keystore Provider: Sets the Cryptographic Service Provider that will sign the document. Leave it empty for pkcs12 type.
• Signed Type: The mode can be Self signed (Adobe.PPKLite) , VeriSign plug-in (VeriSign.PPKVS) and Windows Certificate Security (Adobe.PPKMS).
• Certification Level: The certification level can be NOT_CERTIFIED, CERTIFIED_NO_CHANGES_ALLOWED, CERTIFIED_FORM_FILLING and CERTIFIED_FORM_FILLING_AND_ANNOTATIONS.
• Reason: Sets the signing reason.
• Location: Sets the signing location.
• Contact: Sets the signing contact.
• Appearance:
  • Visible: Sets the signature to be visible on the Position of the selected Page.
  • Page Number: Select the page number for the digital signature.
  • Appearance: There are 3 Options: Description Only, Signer Name and Description, Signature Image and Description
  • Let/Right/Top/Bottom: The position for the digital signature.
  • Use Signature Image: Set the signature image if the Appearance option is Signature Image and Description
  • Use Background Image: Set the background image. Leave it blank if no background image.
  • Background Image Scale:  Set the scaling to be applied to the background image.

4. Click Close to finish.

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