How to Sign a PDF with a Digital Certificate in Adobe Acrobat Reader DC
Question details
The user wants to apply a digital certificate signature to a PDF document, but the necessary Certificates tool appears to be hidden or missing from the default tool menu.
- Product
- Adobe Acrobat Reader DC
- Device & OS
- not provided
- Scenario
- Adding a legally binding or secure digital certificate signature to a PDF file.
- Observed behavior
- The Certificates tool is missing from the default right-hand pane, making it difficult to find the 'Digitally Sign' option. In some cases, the signing options are grayed out.
Ensure you have a valid digital ID (such as a PFX or P12 file) saved on your computer, and check that the PDF does not have security restrictions that prevent modifications.
Locate and Use the Certificates Tool in Acrobat Reader DC
Find the hidden Certificates tool in the main Tools menu, pin it to your shortcut pane, and use it to apply your digital signature.
Adobe frequently updates its interface, which sometimes moves advanced features like digital certificates out of the default view. You can easily restore this tool to your quick access pane.
Open your PDF document in Adobe Acrobat Reader DC and click on the 'Tools' tab located at the top left of the application window.
Scroll down through the tools list until you find the 'Certificates' icon. Click the 'Add' button below it to pin the tool to your right-hand shortcut pane.
Click 'Open' on the Certificates tool. A new toolbar will appear at the top of your document view.
Click 'Digitally Sign' on the top toolbar. Your cursor will turn into a crosshair; click and drag a rectangle on the document where you want the signature to appear.
Follow the on-screen prompts to select your existing digital ID or configure a new one, enter your password if required, and click 'Sign' to apply it.
Easily Sign PDFs with Digital Certificates in WPS Office
WPS Office provides an intuitive, built-in PDF reader and editor that makes adding digital signatures straightforward, without the need to hunt through hidden menus.
- 1. Open your PDF: Launch WPS Office and open the PDF document you need to sign.
- 2. Navigate to the Protect tab: Click on the 'Protect' tab located in the top navigation ribbon.
- 3. Select Digital Signature: Click on 'Digital Signature' or 'Sign Document' from the toolbar options.
- 4. Apply your certificate: Draw your signature box on the page, choose your digital ID file from your system, and confirm to sign the document.
Frequently Asked Questions
Why is the 'Digitally Sign' option grayed out in Acrobat Reader DC?
This usually occurs because the PDF creator has applied security restrictions to the document that prevent any modifications, including the addition of digital signatures. You will need the owner's permission or the password to unlock the document before signing.
How do I create a new digital ID if I don't already have one?
When you select 'Digitally Sign' and are prompted to choose a digital ID, you can select the option to 'Configure a new Digital ID'. From there, follow the prompts to create a new self-signed digital ID and save it securely to your computer.
Why did Adobe remove the sign feature from the main interface?
Adobe updates its user interface periodically to streamline the default view for most users. Advanced features, such as Digital Certificates, are grouped into the comprehensive 'Tools' menu. Users who need these features must manually add them to their quick access pane.
Are digital signatures applied in WPS Office compatible with Adobe Acrobat?
Yes, WPS Office uses standard PDF protocols for digital signatures. A PDF digitally signed using a certificate in WPS Office will be recognized as valid and secure when opened in Adobe Acrobat or any other standard PDF reader.
