Undo changes and undelete content on Plone

One magical and fantastic feature of Plone is the ability to undo (or roll back) changes. This means if you (or someone else) deletes something important, you can effectively undelete it.

Go to your ZMI management page at mysite/manage and click on the Undo tab at the top of the page. There you can see a list of recent transactions which you can roll back.

I found my way to this via this Plone.org doc by David Bain, which has more information.