What the Edit Sparklines dialog changes, as ISparklineGroup.setRanges takes it.
ISparklineGroup.setRanges
The cells the sparklines draw: one or more areas, as ISparklineGroup.getData spells them.
ISparklineGroup.getData
The cells they draw in: one or more areas, each a cell, a row or a column of cells.
What the Edit Sparklines dialog changes, as
ISparklineGroup.setRangestakes it.