arrowHead and arrowTail | can be assigned an arrowType. |
colorscheme | |
compound | is a boolean that controls if clusters can be connected with lhead and ltail. |
constraint | indicates whether an edge should be used in the ranking of the nodes. |
fontname | specifies the font for a label. |
label | specifies the text that is shown with an element (that is: node, edge, cluster or subgraph). |
penwidth | width of the pen (in points) when drawing lines and curves, including the boundaries of edges and clusters. |
rank | (which only can be applied to non cluster subgraphs). |
rankdir | Specify direction of the graph's layout: Top to bottom, left to right etc. |
shape | specifies the shape of node. |
splines | splines="line" forces straight edges (no curves). |
style | controls aspects of of nodes, edges, clusters and subgraphs (clusters) |