Another boost for this suggestion. I just came to this forum to ask if this was possible. I have many diagrams built in yEd, using all the different layout types. Switching between them is difficult - I have to remember which layout is used for which, whether the "Use as sketch" setting is selected, etc.
Maybe there's a way to "record" the settings in a node on the diagram, perhaps invisibly. Or maybe the settings can be saved in the graphml file.