Press space to toggle showing the nodes. Press the ► button to play the simulation: >Click on nodes to "freeze" them, click and drag to move them. >Click and drag on the stage to move the nodes. Press the + button to pause the simulation and add/connect nodes. >To add a node, click on the stage. >To connect a node, click on the first (should turn dark), then click on the second, and the two should be linked. You can cancel this by re-clicking the first node after it has turned dark. Press the -- button to begin deleting nodes. >To delete a node, click on it. Any links to the node will be erased as well.
