User guide

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Compare PDF Files
Reporting all the modifications made to a document is a difficult task if changes weren't tracked during
the editing process. Comparing the new document with its original version is the easiest way to pinpoint
every single change that was made. To compare two versions of the same document, convert them to PDF
in Nitro Pro 9 and use the Compare tool to identify any differences in text, images, and even annotations.
Show context changes
A context comparison searches through the objects on each page and checks if they exist on the second
document. If an object exists, it is then compared for differences with its neighbor. Text, images, and
annotations are compared during this process.
To compare content:
1. Open the two documents that must be compared
2. On the Review tab, in the Advanced panel, click Compare. The Compare Documents dialog
appears.
3. Select the Show changes in context with annotations option, and then click Next
4. Use the Original Document and Changed Document menus to load each document accordingly
5. Click Preferences to change the Compare tool settings. The default settings will cover the most
common scenarios.
6. Beneath the document previews, select the pages to be compared:
l All: Compare the entire document
l Current page: Compare only the page shown in the preview area
l Pages: Enter the desired page or range of pages (separated by a dash). For example, to con-
vert pages 3, 4, and 5 of an 8-page document, enter 3-5.
7. Click Compare to begin the comparison process
Understanding the results:
After the two documents are compared, a new tab will open in Nitro Pro 9's Document Pane to illustrate
the visual differences detected in the files. After a content comparison, the resultant file will highlight
every difference based on the color coding that can be configured in Nitro Pro 9's Preferences.
Show only differences
A visual comparison captures an image of each document and looks for differences at a pixel level. The
result is then shown as an image containing only the differences between the two documents.
To compare visually:
1. Open the two documents that must be compared
2. On the Review tab, in the Advanced panel, click Compare. The Compare Documents dialog
appears.
3. Select the Show only differences between documents option, and then click Next
4. Use the Original Document and Changed Document menus to load each document accordingly
5. Click Preferences to change the Compare tool settings. The default settings will cover the most
common scenarios.
6. Beneath the document previews, select the pages to be compared:
Nitro Pro 9 - User Guide