Use the MindMapTreeLayoutNodeAlignment property to specify the horizontal alignment of the mind-map tree diagram on the canvas relative to the layout direction axis. The resulting diagram position will differ, depending on the MindMapTreeLayoutOrientation property value.
The image below illustrates the MindMapTreeLayoutNodeAlignment property for the mind-map tree diagram when the MindMapTreeLayoutOrientation property is set to Horizontal.

The MindMapTreeLayoutHierarchyAlignment property specifies the vertical alignment of the mind-map tree diagram.