type: int, default:
Whether to treat a node whose name has the form
|edgelabel|* as a special node representing an edge label.
- The default,
label_scheme=0, produces no effect.
sfdpuses a penalty-based method to make that kind of node close to the center of its neighbor.
sfdpuses a penalty-based method to make that kind of node close to the old center of its neighbor.
label_scheme=3invokes a two-step process of overlap removal and straightening.
Last modified June 14, 2021: Introduce per-attribute pages (81b00f5)