In the Page Range Previews section of the Change Page Labels feature, you can view how the labels of the first and the last pages (From page – To page) of a certain page range look like.
In the area of the page range you want to preview, click .
Note: The previews may take a while to be generated and the application may seem frozen. Just wait for the process to finish.
For example, to view how the labels of page range 3 will look like, click for that certain page range.
The previews are actually PDF files opened within the application. This means that you can zoom in or out (or perform other actions that may be available) as if you had opened those files with Adobe Reader.