C1TreeView supports drag-and-drop behavior. For more information see the Drag-and-Drop Nodes topic. To enable drag-and-drop behavior, set the AllowDragDrop property to True:
C1TreeView.AllowDragDrop = True
•C#
C1TreeView.AllowDragDrop = true;
To enable visual drag-and-drop indicators you can set the DragDropArrowMarker and DragDropLineMarker properties.