As you are reviewing Excel files and changes are subsequently made to the spreadsheets, it can be difficult to have an audit trail to ensure changes are made as we expect to see them. Historically some reviewers have been printing a copy of the Excel file as it existed at the time it was reviewed to have a static copy for review purposes. This PDF would then be compared with the updated Excel file to review the changes. While this may be a good solution, there is another option that may be a better alternative.