You can use the Collapsed property to specify a collapsed or expanded page. Specific pages can be collapsed or expanded as well as all of the pages can be collapsed or expanded.

To Collapse a Specific Page at Design Time

To collapse a specific page at design time, select the desired page on the C1TopicBar control, and then open its C1TopicBar Tasks menu to set its Collapsed property to True.

To Collapse or Expand All Pages Programmatically

To collapse all pages programmatically, use the CollapseAll method or the ExpandAll method to expand all pages.