It has never been clear to me how Designer manages its graph window. When double-clicking on a graph from the Explorer, it replaces the graph in the current graph window. What if I want to have two graphs into two separate views? There is no "Open in new Window" menu. And there are also specific behaviors when we are into Editing in Context mode.
I end up constantly opening graphs into mostly the same window, which is wasted time, especially when the graphs have a lot of parameters.