Restore a previous version of an item or file in SharePoint
Open the list or library from the Quick Launch bar.
If the name of your list or library does not appear, click Site contents or View All Site Content, and then click the name of your list or library.
Right click on the space between the item or document name and date, and then click Version Historyfrom the menu. You might need to scroll the menu to see Version History.
If you don't see Version History, click the ellipse (...) in the dialog and then click Version History.
You'll see a list of versions of the file.
In the Version History dialog, hover next to the version you want and click the down arrow on the right side to get a list of options.
Click OK to restore the current version as the latest.
Note: SharePoint doesn't remove the earlier version you just restored, it creates a copy and makes it the latest version.