During the last few days many new features arrived. Nodes can be added via a popup-menü. Existing nodes can be copied. Finally you can turn Nodes into DisplayUnits in the GUI. DisplayUnits show their results, while normal units just pass the result to the next unit. I'm just wondering, if it makes sense to add a bypass-function, although this can be done easily in the graph anyway.
Node deletion will be up next. One major task, that I haven't touched yet is the interface for changing the parameters of a unit. So far those can't changed. I know VisualAp has something, but I haven't checked if I can use it.