If the AJAX accordion you previously created has:
inline content, use the associated property inspector to edit its settings:
If you click the Manage Regions button a dialog box will open:
Its interface controls are included in the AJAX Accordion Wizard user interface. Configure them as explained here.
external file content, use the generated AJAX Accordion From File server behavior to edit its settings. Double-click its name in the Server Behaviors tab of the Application panel:
Note: With this server behavior you can edit an existing AJAX accordion in page, with external content, or generate a new one.