Combination Charts work in any Summary or Matrix report. The configuration is mostly chart type selection plus series formatting.
- Build the underlying report
Create a Summary or Matrix report with at least one grouping and at least two summary fields (the metrics you want to combine).
- Add a Combination Chart
Click Add Chart, choose Combination Chart. Set the X-axis to the grouping.
- Configure series
For each summary field, pick Bar or Line. The volume metric is usually Bar; the rate metric is usually Line.
- Enable dual Y-axis when scales differ
If the metrics have very different scales (count vs percentage), enable the secondary Y-axis. Assign each series to the appropriate axis.
- Format for clarity
Pick colour-blind-safe colours, label axes, format values per series (currency for revenue, percentage for rate). Save the report.
The underlying report format Combination Charts require.
The X-axis dimension.
The metrics to overlay; at least two required.
Combination Chart selected in chart configuration.
Primary or secondary axis per series.
- Forgetting dual Y-axis when scales differ flattens the line series. Enable when one metric is a count and the other a percentage.
- Too many series produce visual clutter. Cap at three; otherwise split into separate charts.
- Colour choices that are not colour-blind-safe exclude part of the audience. Pick palette deliberately.
- Combination Charts require Summary or Matrix format. Tabular reports cannot render them.