Making a series translucent
You can make a chart series translucent so you can see an image or color behind the chart data. For example, Figure 22‑98 shows two versions of a chart that uses an image as the plot background. The chart on the left uses a solid series. The chart on the right uses a translucent series.
To make a series translucent, navigate to the Series section of Format Chart, and select Translucent for the series.
Figure 22‑98 Pyramid charts using opaque series and translucent series