Currently, only Pie and Donut charts can automatically show data labels as a percentage of total. For all other visuals (like Bar, Column, Line, or Treemap), users must manually create a DAX measure to calculate “% of total.”
This creates extra complexity for report authors and is inconsistent with the simplicity of Pie charts.
Add a visual-level option (in the Format or Data labels pane) to “Show value as → Percent of total”, similar to Excel’s “Show Values As” or Power BI’s existing “Show Value As” feature for Table / Matrix visuals.
The visual should handle the denominator automatically based on current filters and slicers, no custom measure required.
lbendlin
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