Abstract: A computer program, method, system and device for displaying a three-dimensional rendering of a multi-level structure having a plurality of units, involving displaying a viewpoint of a three-dimensional rendering of the multi-level structure, wherein the viewpoint can display information about a unit in the plurality of units of the multi-level structure that is visible within the viewpoint, and optionally allowing the plurality of units to be searched and graphically marking units which meet the search criteria of the search.