The Upload and Compare button allows you to upload another file and compare it to your current document.
In the comparison view, from left to right, you will see your current agreement, the uploaded document, and a list of content and style changes.
Under the “Change List” on the right you can select to view Content changes, Style changes, or both. Once you’ve reviewed the differences you can choose to accept and Import the newly uploaded file, or Cancel to return to your original document.
If you choose to Import it will automatically save the import as a new version.