Duplicating a site is one of the biggest time savers if you would like to:
- Try out a new website organization
- Work on a theme while others are working on content
- Upgrade a live website
It's as simple as selecting 'Duplicate' from the dropdown on the Site Details button.
A new site will be created with all the pages, themes, and user settings from the old site. Then you can go in and change those, as you wish.