Choose the user interface of your SharePoint sites. If you choose to update, your sites will use the new interface, which ...

Choose the user interface of your SharePoint sites. If you choose to update, your sites will use the new interface, which includes the ribbon. Choose Preview the updated user interface to evaluate new features. You will be able to commit the update or to return to the user interface of the earlier version of SharePoint. If you notice that some pages from the earlier version of SharePoint display incorrectly after Visual Upgrade, you can {0}reset the pages{1} or all pages on this site.