We are sorry for the trouble. As desxribed you want to view both the documents after running the comparision of 2 documents.
Acrobat displays the results in a new document. The first page provides an easy-to-scan summary of all file differences.
Click the Go to First Change button to begin reviewing each difference in detail.
Side-by-side view: Use the Side-by-Side (Ctrl+\) view to see a parallel view of results where the differences are shared in highlighted bands. The old file is displayed on the left and the new file is displayed on the right, with the changes highlighted in each band connecting across the files for easier review. Click a band to display a pop-up note detailing all of the changes within the band. You can also click the highlighted content to open the pop-up.