To lighten the picture, you adjust the Transparency slider to the right. The bottom-center
chart in Figure 2.31 has a 40% transparency.
Mixing the Plot Area Color with the Chart Area Color
The Transparency slider on the Format Plot Area dialog allows you to see through the plot
area to view whatever formatting has been applied to the chart area.
You may notice that there is not an icon on the Layout ribbon for formatting the chart
area. Select the chart area by clicking any white space just inside the border of the chart.
Click Format Selection in the Layout ribbon, press Ctrl+1, or choose Format from the
right-click menu ...
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