Working with drupal panels in drupal 7 (Panel Variants)
Do you want to display different content depending on whether the user is logged in or anonymous. Drupal panels introduces the concept of using variants. Variants can be described as ways in which pages can be displayed. You can make use of as many variants as you like in a panel. With variants you can have different displays for different users depending on their permissions or roles. We also talk about selection rules which help determine the variants a particular user sees.