In this video, I show off the new protocol debugger in CPN Tools 4. I use it to show another new feature, remote control of the GUI to create canvases and auxiliary graphics. Finally, I show a demo program putting this to use to create a nice visualization. http://www.youtube.com/watch?v=kEe1Un_2ptk https://westergaard.eu/2013/01/demo-of-debugging-and-visualization-in-cpn-tools-4/