Learn how to use the Web Capture and Compare Documents commands in Acrobat 9 Pro with this tutorial selected by experts at Adobe. You can use this command to compare the differences between two versions of a web page. First, you have to convert the pages to PDF files using the built-in Convert-to-PDF command in Acrobat 9. Then, select the Compare Document command from the Document menu, choosing the settings. The program will run through the two files, compare them and present the results in a report you can then review.