What is the best way to display axis labels? I need to display a label indicating that the x-axis values are volume and y-axis values are cost for example. The left and bottom titles are not sufficient because the legend may be displayed on the left/bottom and then the title would be displayed to the left/bottom of the legend. Annotations are an option, but I'm hoping for a better, more well supported option.
In this example, cost and volume are annotation:
there are the TitleLeft and TitleBottom properties of the chart, but I think Annotations are the best option because their positioning is more flexible than the chart titles.