We need to be able to label specific data points with dynamically generated values (including text). Use cases include: * Labeling the first or last point of line charts with values * Labeling the last point of series in a line chart with the series name, to directly inform the user which series is which, rather than have them constantly move their eyes between a legend and the many series on a graph. * Labeling particular values of interest, to aid storytelling. These things are bulk-standard features of good dashboard design, and are essential in order to design optimal user-friendly dashboards with low cognitive burden. Gotta say that humble ol' Excel is streets ahead of Power BI in regards to data labeling. Note that measure-driven tooltips are NOT a substitute for this feature. We need ways to draw the users' attention to particular points or features without relying on mouse-over.