The History Line Chart Viewlet
The History Chart Viewlet can be used to plot the value for multiple similar variables over time. For each interval over the selected time period, the user can plot the maximum, minimum, average, or sum of the variable. New viewlet functionality allows the user to manually drag a marquee over any section of the lines to zoom in and view a particular portion of the graph, and then use the horizontal pan bar along the top of the viewlet to scroll through the data.
