How to recover or restore section or page

Summary

How to recover deleted section or restore page to previous version

Content

Hi - 
So embarrassing to ask this - alas, I am a newbie.

It appears that I've mucked up our Learn Center landing page.  Originally it had three areas in region 2, and depending upon the group display filter (I think) the correct area would show depending upon the user.

I apparently deleted one of the areas.

Is there a way I can find and recover a deleted area?  

Or, to return to a previous version of the page before my hands touched it?  

Thank you in advance ~