User guide

205 ©Nitro
Digitally sign a document
Digital signatures are like paper-based signatures, but better because they include encrypted information
so you can verify their authenticity.
You can digitally sign a document to securely record the identity of the author, and to verify the content
has not changed. Digital signatures in a PDF document can show text, or an image such as a photo or an
image of your handwritten signature.
To digitally sign a document:
1. On the Protect tab, in the Signatures group, click the arrow under Sign, and select a signature
from the gallery. To sign a document, you must first have a digital ID. For more information, see
Digital IDs and Manage Digital IDs.
2. Click on the page where you would like to place your signature
3. Nitro Pro 9 prompts you to save the PDF file with the digital signature. Click the digital signature to
view and confirm its details, and then save your PDF file. For more information, see View and
validate certificates and signatures.
Nitro Pro 9 - User Guide