I was trying to set (change) a vertex coordinate this way: g = Graph@{1 -> 2, 2 -> 3, 3 -> 1, 1 -> 4} SetProperty[{g, 1}, VertexCoordinates -> {0.25, 1}] But failed. At the same time this works nicely SetProperty[{g, 1}, VertexLabels -> 1] Both propeties are in this list PropertyList[{g, 1}] Could youRead more