I will also post my first question, this was the main reason why I registered for this mailing list. The description and examples were usually more than enough for me to use graph_tool, nice job ;) I have a question though. In the "graph_tool.topology.is_planar(*g*, *embedding=True*)" how do I use the embedding information to print my graphs planar. Do I have to do that for myself, or there is a built in function that I didn't find? Do I have to add the edges following the order that they come using the embedding somehow? If there is no option for this in graph tool any help or idea, tip or trick is greatly appreciated. I've tried to use the Kuratovski, but it won't print them planar, also tried the maximal planar option, didn't help. Thank you very much Csongor The adjacency matrix of an example of my graphs can be seen below: (0, 3) 1.0 (0, 11) 1.0 (1, 0) 1.0 (2, 1) 1.0 (3, 2) 1.0 (3, 6) 1.0 (4, 7) 1.0 (4, 23) 1.0 (5, 4) 1.0 (6, 5) 1.0 (7, 2) 1.0 (7, 6) 1.0 (8, 5) 1.0 (8, 11) 1.0 (9, 8) 1.0 (9, 14) 1.0 (10, 9) 1.0 (11, 10) 1.0 (12, 15) 1.0 (12, 19) 1.0 (13, 10) 1.0 (13, 12) 1.0 (14, 13) 1.0 (15, 14) 1.0 (16, 15) 1.0 (16, 19) 1.0 (17, 16) 1.0 (17, 22) 1.0 (18, 17) 1.0 (19, 18) 1.0 (20, 1) 1.0 (20, 23) 1.0 (21, 18) 1.0 (21, 20) 1.0 (22, 21) 1.0 (23, 22) 1.0