> ## Knowledge Base Index
> Fetch the complete knowledge base index at: https://staging.chrisp.chat/sitemap.xml
> Use this file to discover available pages before exploring further.
> Pure-Markdown content can be obtained by appending a '.md' suffix to the content URLs listed in the sitemap (without the trailing slash).

# Comparing PDF Documents

* [Open two versions of PDF documents](#3-opening-two-versions-of-pdf-documents)
* [Compare with PDF-XChange](#3-compare-with-pdf-xchange)
* [Compare with Adobe Acrobat](#3-compare-with-adobe-acrobat)
* [Compare with Bluebeam](#3-compare-with-bluebeam)

| Depending on the PDF program, either all changes or only specific changes (e.g., to text, images, and annotations) can be detected and displayed.

### Opening Two Versions of PDF Documents

|| To perform the comparison, you must set up the connection from buildagil to the appropriate PDF program. You can find instructions here: [Connect Local PDF Programs](/en/article/editing-pdf-documents-with-local-programs-1hn87mt/).

To compare two PDF documents, you must first open both documents in the appropriate program. To do this, navigate to the desired PDF document and then click ****Edit in PDF app****.

![](https://storage.crisp.chat/users/helpdesk/website/-/3/4/1/2/3412a3a8bdde1000/86938ff4-6473-4e93-8428-8fc56f_14bfaf3.jpg)

The document will then open in the appropriate PDF program. For more information on editing in PDF programs, see the following articles:

[Editing PDFs with PDF-XChange](/en/article/editing-pdfs-with-pdf-xchange-1vcrny3/)  
[Editing PDFs with Adobe Acrobat](/en/article/editing-pdfs-with-adobe-acrobat-7q1eia/)  
[PDF Editing with Bluebeam](/en/article/pdf-editing-with-bluebeam-10bwrsd/)

After that, you can open a second document or an older version of the document. To open an older version of the same document, click ****Details & version history**** on the document.

![](https://storage.crisp.chat/users/helpdesk/website/-/1/6/0/5/1605aec83ebf8a00/9507d52b-a1cb-47a5-ac1a-aeb6e8_1vjkyak.jpg)

Then open the desired version using ****Open Version****.

![](https://storage.crisp.chat/users/helpdesk/website/-/5/8/6/8/5868e33ed3d55c00/77cbd1d8-0a8e-406f-bf64-d86736_w86h7k.jpg)

To open the file in your PDF reader, click ****Open in PDF app****.

![](https://storage.crisp.chat/users/helpdesk/website/-/6/b/d/0/6bd0b6c2ff584800/4f316885-af4d-47fd-9b15-399e66_1rrg7ub.jpg)

Both PDF documents should now be open in the appropriate program.

### Compare with PDF-XChange

The process of comparing PDF documents in PDF-XChange is described in [Help from PDF-XChange](https://www.tracker-software.com/knowledgebase/324-How-do-I-compare-documents-in-PDF-XChange-Editor).

### Compare with Adobe Acrobat

The process of comparing PDF documents in Adobe Acrobat is described in [Help from Adobe Acrobat](https://helpx.adobe.com/acrobat/using/compare-documents.html).

### Compare with Bluebeam

The process for comparing PDF documents in Bluebeam is described in [Help from Bluebeam](https://support.bluebeam.com/articles/compare-documents-vs-overlay-pages/).