Panels | Drupal.org

Panels | Drupal.org: In a Panel, you can create contexts, which represent the objects being displayed. For example, when displaying the node view, NID argument on the page is converted into a context through the 'arguments' system. You can then create a relationship from that node to, say, the node author, or if you have a node reference from CCK, a related node [as of CCK 2.3]. Once the contexts are in place, content specifically about those contexts can be placed. For the node context you can add CCK fields, the node body, attached files and a host of other information that can be provided by plugins. For the user context you can display things like the user picture or profile. Note that CCK 2.3 and later only has support for Panels 3.