I have a graph that is processed by neato and I\'m adding new edges to it. However, I don\'t want that the old nodes to be moved. I want that neato computes the new position
You can pin a node's position by setting the node attribute pin=true.
Or put a '!' at the end of the pos attribute: pos="34,12!"
pos="34,12!"
Running it with -n option should do the trick.