Would like the ability to use the metrics separators that are available for when metrics are run down the y-axis (to delineate sales versus inventory metrics, for example) and place the separators above the metrics to "group" them together when metrics are run across the x-axis. Would ideally want to be able to color code each separator with a different color for an additional visual cue between groups of metrics (I think we may already be able to do the color-coding using conditional formatting logic rules).