Where do I import a panels variant? In the Panels UI, when you are editing a variant, you have the option to Export the variant, and the tooltip says "Export the variant into code to import into another page."

This is exactly what I would like to do, but where do I paste the code to import it?  When I choose Add variant, I don't see an option to import, and I don't see an import option in the Page Manager UI (admin/structure/pages) either.
If you are not the super admin (user id = 1) on your drupal site.

You need to give the permission for "Use CTools importer" to be able to import a variant.