Navigation Pane Visible Group Headers (Group Button Panel)
In the Navigation Pane, visible group headers are contained within the group button panel located between the splitter and the overflow panel. Visible group headers display group captions and images in the expanded Navigation Pane, and group images only, in the collapsed Navigation Pane.
The table below lists the main members which affect the element's specific characteristics:
|Maximum Number of Visible Groups||NavigationPaneView.MaxVisibleGroupCount|
|Appearance and Functionality||See Group Header|