Display chart annotations more conspicuously
To access chart annotations, users have to first hover over the metrics display, click on the info icon next to the title of a specific metric, and then read the annotations under the explanation of that metric. I didn't know they even existed until a support person happened to mention the vertical lines and I asked what they were. It would be more user-friendly to have the annotations (really, a legend for vertical lines) displayed separately in a more conspicuous location. Maybe in an info icon next to the annotation toggle? Another option would be for the vertical lines to identify themselves on hover/click, in which case a legend wouldn't be needed at all.