root
Specifies nodes to be used as the center of the layout
type: string | bool, default: <none> (graphs) , false (nodes)
The center of the layout will be the root of the generated spanning tree.
- As a graph attribute, this gives the name of the node.
- As a node attribute, it specifies that the node should be used as a central node.
In twopi, root will actually be the central node. In circo, the
block containing the node will be central in the drawing of its connected
component. If not defined, twopi will pick a most central node, and circo
will pick a random node.
If the root attribute is defined as the empty string, twopi will reset it to
name of the node picked as the root node.
For twopi, it is possible to have multiple roots, presumably one for each
component. If more than one node in a component is marked as the root,
twopi will pick one.
- Graphs
- Nodes