I would like to see a feature where it's possible to add a footnote to a visual. This would help to make certain filters in the filter pane or inside of measures more explicit to report consumers, or would allow for providing additional context on what is displayed in the visual, especially when these types of details might not be important or central enough to include in the Title or Subtitle of the visual. I would imagine that a footnote could look similar to a Title or Subtitle on a visual, so that a report developer could use either a string literal value as a footnote, or add a measure as a footnote to a visual. The report developer could then also choose the appropriate font, color alignment, etc. for their footnote. If possible, it would also be nice to have the ability to add a divider or some customizable space between the bottom of the visual and the footnote.
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