OOF2: The Manual
Layers that display the same object can be grouped together
into a LayerSet. For example, a Skeleton
might be displayed by drawing its edges
and by filling each Element according to its
material
color. If these two Layers are in one LayerSet, then
they will always refer to the same Skeleton. Changing the Skeleton
of one Layer will also change the Skeleton of the other Layer.



