Are you tired of printing documents, signing them, and then scanning them back to send as PDFs? Adobe Reader XI offers a convenient solution: digital signatures. This feature enables you to sign documents electronically, speeding up processes and reducing paper waste. Let's guide you through a step-by-step process on how to enable and use digital signatures in Adobe Reader XI.

Adobe Reader XI, while an older version, is still widely used and provides robust features for PDF handling. Before we begin, ensure you have Adobe Reader XI installed and updated. Now, let's dive into enabling digital signatures.

Enabling Digital Signatures in Adobe Reader XI
The first step is to enable the digital signature feature in Adobe Reader XI. This is a straightforward process, accessible through the software's preferences.

Once you've enabled this feature, you can proceed to create and apply your digital signature to PDF documents.
Accessing Preferences

Adobe Reader XI's preferences are where you'll find the digital signature settings. Here's how to access them:
1. Open Adobe Reader XI. 2. In the menu bar, click on "Edit" (Windows) or "Adobe Reader" (macOS). 3. Select "Preferences" from the dropdown menu. 4. In the Preferences dialog box, select "Sign & Certify" from the left-hand menu.
Enabling Digital Signatures

Now that you're in the Sign & Certify preferences, you can enable digital signatures:
1. Under the "General" section, check the box next to "Enable Protected Mode at startup." 2. Click "OK" to save your changes and close the Preferences dialog box.
Creating a Digital Signature

After enabling digital signatures, you can create your signature. This process involves using a USD (User Security Device), like a hardware key, or a software certificate.
For this guide, we'll focus on creating a digital signature using a software certificate. If you're using a USD, consult Adobe's specific guides for your device.









Using a Software Certificate
If you have a software certificate, you can use it to create your digital signature. Here's how:
1. Open the PDF document where you want to place your signature. 2. In the toolbar, click the "Sign Document" button (it looks like a pen and paper icon). 3. In the toolbar that appears, click "Sign Document" again to open the "Sign and Certify Document" dialog box. 4. Under "Sign As", click the dropdown arrow and select "Digital ID". 5. From the list of available digital IDs, choose the one associated with your software certificate. 6. Review the "Signature Appearance" section to ensure your personal information is correct. 7. Choose the certificate location (this is the place in the PDF where your signature will appear). 8. Click "OK" to apply your digital signature to the document.
Certifying a Document
Certifying a document is similar to applying a digital signature but serves a different purpose. Digital signatures are primarily used to validate your authorship of a document, while certifications vouch for the document's integrity and authenticity. Here's how to certify a document:
1. Follow steps 1-5 from the previous section to open the "Sign and Certify Document" dialog box. 2. Under "Sign As", select "Adobe Certified Document". 3. Review the document and certification details. 4. Choose the destination in the PDF where you want the certification to appear. 5. Click "OK" to apply the certification to the PDF.
With this comprehensive guide, you should now be able to enable and use digital signatures in Adobe Reader XI effectively. Remember, for digital signatures to be valid, they must be created using a trusted certificate or USD. Always ensure your signature-creating tool is up to date and trusted. Forging digital signatures is a crime, so use this feature responsibly. Happy signing!