If gridded elevation data (i.e. DEMs) is loaded and one or more features is selected, the Apply Elevations from Terrain Layers to Selected Features option will appear on the right-click option menu. Selecting this option will add an ELEVATION attribute to each selected point feature containing the elevation value at each point location from the top-most terrain layer at that location. Any selected line or area features that have a valid elevation from loaded terrain at each vertex location will have a set of per-vertex elevations added to the feature containing the elevation at each vertex from the loaded terrain layers.