ChartLegends

is an option for charting functions that specifies what legends should be used for chart elements.

Details

ChartLegends->{leg₁,leg₂,…} uses leg_i as a legend label for the i element in each dataset.
The leg_i can be any strings, graphics, or other static or dynamic expressions.
Any legend labels that are specified are collected in a legend that is displayed as part of the chart.
The overall form and appearance of legends is specified by settings for LegendAppearance.
None indicates no legend label. If there are more elements in a dataset than lbl_i specified, the subsequent leg_i are taken to be None.
If explicit legending is specified in a dataset using Legended, it is added to legends specified through ChartLegends.
Positioning of legends and other effects can be specified using Placed.
ChartLegendsPlaced[leg,pos] places the legend leg at the position specified by pos.

	Above,Below,Before,After	positions outside the bounding box for expr
	{h,v}	horizontal h and vertical positions v
	{{e_x,e_y},{l_x,l_y}}	scaled position {l_x,l_y} in the legend at scaled position {e_x,e_y} in expr

Possible horizontal positions include Before, Left, Center, Right and After.
Possible vertical positions include Below, Bottom, Center, Top and Above.
ChartLegends->{spec₁,spec₂,…} uses the successive spec_i to specify legend labels for successive dimensions in nested lists of datasets.

Examples

Generate a legend based on chart style:

Generate a legend for datasets:

Unused legend labels are dropped:

Place the legend below the chart:

Place the legend inside the chart:

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