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Chapter 9: Digital signatures
You use a digital signature much like a handwritten signature—to approve documents. A digital signature verifies
your identity and may include a photo, an image of your handwritten signature, or other personal details that you
choose. Document authors can attest to the contents of their documents by adding a certifying signature. If you
receive a signed Adobe PDF, status icons let you know if the signature is valid. If a signature is questionable, you can
verify it manually.
Quickstart
The following topics provide overview steps to some common digital signature tasks.
Create a signature appearance
You can modify your digital signature appearance. For example, you can include your scanned signature.
(Optional) Save the desired image on a page by itself, and convert the page to PDF.
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2
Choose Edit > Preferences (Windows) or Acrobat (Mac OS) > Preferences, and select Security.
Click New, and type a title.
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4
(Optional) Select Imported Graphic, click File, and select the desired file.
Specify options as desired.
5
See also
"Create the signature appearance" on page 276
Sign a PDF
Use a digital signature to indicate your approval. For best results, change your security preferences to always sign in
Preview Document mode, so that you can view and sign the PDF in a secure state.
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Click the signature field. Or, click Sign
Follow the on-screen instructions to apply your digital signature.
2
If the document does not contain an unsigned signature field, click Sign and choose Place Signature to sign the PDF.
See also
"Sign a PDF" on page 279
Certify a PDF
Certifying a PDF indicates that you approve of its content and allows you to specify the types of changes that are
permitted for the PDF to remain certified.
Click Sign
on the Tasks toolbar, choose Certify With Visible Signature or Certify Without Visible Signature,
1
and click OK.
, and choose Sign Document.
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