BUILT-IN MATHEMATICA SYMBOL

BarLegend

BarLegend[cf]
generates a legend that identifies colors from the color function cf with an automatic range of values.

BarLegend[{cf, {min, max}}]
generates a legend that identifies colors from the color function cf with the range of values between min and max.

BarLegend[cf, contours]
generates a legend that identifies color ranges from the color function cf based on the set of contours contours.

Details and Options Details and Options

BarLegend uses a list of colors associated with color function cf to identify the contours between min and max in the visualization or other legended item.
BarLegend is used automatically in functions such as ContourPlot and ListContourPlot.
Within visualization functions, Automatic in BarLegend[Automatic, ...] is automatically replaced by the actual color function, data range, and contours specification needed to determine the contour values and colors in between.
In BarLegend, contours can take the following forms:

	n	contours at n equally spaced levels
	Automatic	contours chosen automatically
	All	all contours
	None	no contours
	{Automatic,n}	at most n contours chosen automatically
	{f₁,f₂,...}	contours at levels
	{{f₁,gr₁},...}	contours drawn with graphics directives
	func	a function to be applied to , to get the list of contours

BarLegend[cf, contours] may use a list of colors or a continuous spectrum depending on the density of contour values.
Legended[expr, BarLegend[...]] can be used to apply a legend to an arbitrary expression expr.
The following options can be given:

LabelStyle	Automatic	style to use for labels
LegendFunction	Identity	wrapper for the overall legend
LegendLabel	None	overall label for legend
LegendLayout	Automatic	legend layout to use
LegendMargins	Automatic	space between legend content and boundaries
LegendMarkers	None	markers to use to indicate each element
LegendMarkerSize	Automatic	size of the shape

BarLegend is displayed in StandardForm as a graphics object. In InputForm, it is displayed as an explicit list of color function, data range, and contour values.
In BarLegend, LegendLayout can have the following forms:
Automatic automatically determine layout

"Row" display legend in a horizontal row

"Column" display legend in a vertical column
In LineLegend, LegendLayout can have the following forms:

	Automatic	automatically determine layout
	"Row"	display legend in a horizontal row
	"Column"	display legend in a vertical column
	"ReversedRow"	display reversed legend in a horizontal row
	"ReversedColumn"	display reversed legend in a vertical column