If you have enabled Advanced Dataflow, either through the GUI menu:
Design > Settings > Simulation
or by using -advdataflow switch with your asim command, you are able to debug your design interactively with Waveform Viewer and Advanced Dataflow.
During the simulation, you can select a signal in the waveform window, right click on it to add it to Advanced dataflow Window.
You can also right click on any signal in the Advanced Dataflow and add it to the Waveform Viewer.