Hi I modified the admin and welcome, to allow create a model graph.
<https://lh5.googleusercontent.com/-z1rs1IRsFcQ/UMyMMJlwbiI/AAAAAAAAABQ/RYtc02P-6EU/s1600/button.jpeg> The click in button "grahp model" shows something like: <https://lh3.googleusercontent.com/-PBWs_z2wW9A/UMyNvshomVI/AAAAAAAAABg/oJbgEb1wjks/s1600/diagram.jpeg> depends only of pygraphviz. Best Regards, Jose --
