EdgeOrigin (1) 

Controls which side sources are drawn on -- Left, Right, Top, or Bottom -- and hence which direction flow travels across the page:

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"VertexLabelPosition"  (2) 

By default only the vertex name is shown (centered) but "VertexLabelPosition" can take values None, Above, Below, Top, Bottom or a number:

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"VertexLabelPositon" can also take a second value for the alternate dimension:

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VertexValuePosition (1) 

The value of the vertex flow can be placed with the same settings as VertexLabelPosition:

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EdgeValuePosition (1) 

Label edges with the value of the flow through it. The values Above, Below, Top, Bottom, Center, None and numerical values are supported, as well as {val1,val2} pairs:

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VertexSpacing (1) 

The fraction of each column's rendered height taken up by gaps between its vertices:

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VertexColors (3) 

The color of vertices and the corresponding outflows are controlled by "VertexColors". A list of colors can be provided:

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A named color theme from ColorData can be used:

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A numbered "Indexed" color theme can be used from ColorData:

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VertexRenderingFunction (1) 

A custom Function[{centerX, centerY, width, height}, …] can draw each vertex as something other than a rectangle; the color set by "VertexColors" is prepended automatically:

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EdgeOffset (1) 

The edge flows meet behind the vertex but you can choose to space them around the vertex:

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VertexLabels (2) 

When the input is a matrix, vertices are labelled by the index number. You can override those with "VertexLabels":

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"VertexLabels" can be used to specify more complex labels that can be specified by "LabelStyle":

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LayerSpacing (2) 

The coordinate system places vertices at integer x-positions with y-values that correspond to the flow values:

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Space the vertices differently with "LayerSpacing":

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VertexWidth (1) 

Control the width of vertices:

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OrderIterations

SankeyChart attempts to minimize the times that flows cross over each other. In complex graphs this can take time. "OrderIterations" limits the computation. The default is 8 iterations but any integer value can be used.

EdgeOpacity (1) 

Outflow edges are colored the same as their source vertex but are distinguished by Opacity:

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LabelStyle (1) 

Control the appearance of text labels:

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VertexPositions (2) 

Vertices are placed automatically:

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But one or more can be placed manually:

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