OptionalhorizontalOptionallevelMultiplies the distance between consecutive levels — the depth axis of the tree, or
the gap between rings in radial mode. At 1 the tree is scaled to fill the canvas.
OptionalradialShould the nodes be placed radially instead of vertically
The grap between each layers used in the radial mode
The algorithm to use to find the root of the tree
OptionalsiblingMultiplies the distance between nodes within a level — the breadth axis.
Ignored in radial mode, where a level always spans the full circle.
OptionalspacingWhether the two spacing multipliers tune themselves from the size of the nodes and the shape of the tree, or stay exactly where they are put.
'auto' is the default — except for a tree that sets levelSpacing or
siblingSpacing explicitly, which is taken as having made up its mind. Turning
either multiplier by hand afterwards also leaves auto, permanently.
OptionalstrengthThe strength of the force keeping the nodes placed to form a tree in place
Should the nodes be placed horizontally rather than vertically