SetGraphOptions — set graph display options
GraphOptions — retrieve graph display options
CircularEmbedding — place all vertices on a circle
ChangeVertices — specify coordinates of vertices
RankedEmbedding — place vertices based on their rank
RotateVertices — rotate vertex positions about the origin
TranslateVertices — shift vertex position by a given vector
VertexStyle — style of displayed vertices
Highlight — highlight elements of a graph
