Sets the font used for `textinfo` lying outside the sector. This option refers to the root of the hierarchy presented at the center of a sunburst graph. Please note that if a hierarchy has multiple root nodes, this option won't have any effect and `insidetextfont` would be used.

Rotates the whole diagram counterclockwise by some angle. By default the first slice starts at 3 o'clock.

Sets the horizontal domain of this sunburst trace (in plot fraction).

Sets the vertical domain of this sunburst trace (in plot fraction).

If there is a layout grid, use the domain for this row in the grid for this sunburst trace .

If there is a layout grid, use the domain for this column in the grid for this sunburst trace .

Sets the source reference on Chart Studio Cloud for  parents .

Sets the default sunburst slice colors. Defaults to the main `colorway` used for trace colors. If you specify a new list here it can still be extended with lighter and darker colors, see `extendsunburstcolors`.

If `true`, the sunburst slice colors (whether given by `sunburstcolorway` or inherited from `colorway`) will be extended to three times its original length by first repeating every color 20% lighter then each color 20% darker. This is intended to reduce the likelihood of reusing the same color when you have many slices, but you can set `false` to disable. Colors provided in the trace, using `marker.colors`, are never extended.

Visualize hierarchal data from leaves (and/or outer branches) towards root with rectangles. The treemap sectors are determined by the entries in *labels* or *ids* and in *parents*.

Determines d3 treemap solver. For more info please refer to https://github.com/d3/d3-hierarchy#treemap-tiling

When using *squarify* `packing` algorithm, according to https://github.com/d3/d3-hierarchy/blob/master/README.md#squarify_ratio this option specifies the desired aspect ratio of the generated rectangles. The ratio must be specified as a number greater than or equal to one. Note that the orientation of the generated rectangles (tall or wide) is not implied by the ratio; for example, a ratio of two will attempt to produce a mixture of rectangles whose width:height ratio is either 2:1 or 1:2. When using *squarify*, unlike d3 which uses the Golden Ratio i.e. 1.618034, Plotly applies 1 to increase squares in treemap layouts.