10 UMLPackage 30 30 280 260 EmptyPackage -- bg=orange UMLClass 60 80 140 150 SimpleClass bg=blue layer=2 UMLClass 110 110 170 150 Foreground via the "layer" command bg=green layer=3 UMLPackage 30 310 280 260 EmptyPackage -- bg=orange UMLClass 60 360 140 150 SimpleClass bg=blue layer=2 UMLClass 110 390 170 150 Background via the "layer" command bg=white layer=1