Hi.
Ideally, graphs you can zoom into with areas of interest, click the mouse, drag the region, produce a new graph with that region.
Second feature request, having the ability to mouse-over peaks in graphs and see the values of those peaks, in a row on the bottom of the graph or as a mouse-over pop-up or similar.
I’ve seen the second feature request done with some other rrd graph tools, so it should be possible to implement here.