Variability charts allow to optionally plot Grand Mean and Grand Median lines. While Grand Mean automatically adds a label of the overall mean to the right of the plot, Grand Median does not show any label.
My proposal is to allow for showing a label for the Grand Median the same way as for Grand Mean. I propose that the look and feel for Grand Mean and Median shall be the same: Show a label by default, allow the user to turn on/off the label in the graph context->Customize...->Grand Mean/Median properties.