voro_margin
Tuning margin of Voronoi technique
type: double, default: 0.05, minimum: 0.0
Factor to scale up drawing to allow margin for expansion in
Voronoi technique.
dim' = (1+2*margin)*dim.
Valid on:
Note:
neato, fdp, sfdp, twopi, circo only.
Search the Graphviz codebase for "voro_margin"