Wanted to say that the shortcut SHIFT + SPACE , which toggles the maximizing of any unity-window, does not work with nodecanvas. It allows to maximize, but the when returning to normal ( after executing the shortcut again ), the graph-window stops working, must be closed and opened again from the menu.
I guess this should not behave like that.
Maximizing is s quite handy feature for quickly enlargening workspace. Especially when one has to work with only 1 screen.