This figure shows the Upgrade Portal confirmation dialog with the message "Your portal was created in a pre-11.1.1.8.0 release. You can upgrade it to add support for page hierarchies (subpages) and page variants (for display on other devices). Click Upgrade to upgrade the portal. This action cannot be undone. It is strongly recommended that you export the portal to create a backup before upgrading. At the bottom of the dialog are two buttons: Upgrade and Cancel.