As with Drafts, you may need to reference previous versions of a page as you make changes. Unlike Drafts, each time you submit changes to your page, the old version is stored in a versions folder.
1.) Open the page, then find and select the '...More' button in the top right corner of the page. Find 'Versions' and select.
2.) You will see who is responsible for the most current version of the page, and a list below with every submitted version of the page along with the author of that submission.
3.) Select the version of the page you need, then select the 'Reverse' arrow button to restore the previous version.