Page versions
OU automatically saves a version of your page every time it is published.
Manually saving a version
You can also choose to save a version manually when you have edited a page but are
not ready to publish. The page must be checked out to see this option.
Click 'Save Version' in the drop down. You will be prompted to enter a description
of the version (so you can identify it should you need it).
After typing a description, click 'Save Version'.
Accessing Versions
You must have the page checked out to access a version.
You will see the option to access versions from either the edit page view: