This image shows an example of a shaded graph, or histogram, created using the VT105's "waveform graphics" mode. In this case the second graph has the histogram mode turned on, causing it to fill in the area under the curve. Because the curve data was stored separately for the two graphs, the system could control intensity to brighten areas where they overlapped to keep both visible. This can be seen in the areas were the upper graph lies over the shaded area.