NuGet Package: DevExpress.Win.Navigation
A Orientation enumerator value that specifies the page header orientation.
When the ItemOrientation property is set to Orientation.Vertical, page headers rotate 90 degrees clockwise, becoming aligned in a single row, one below the other. Page header content (both caption and glyph) is also rotated. The following figure illustrates a Navigation Pane with the ItemOrientation property set to Orientation.Horizontal (default value) and the same pane with vertically aligned headers in different Dock modes.