You can view core allocation of classes in animated sequence
diagrams.
When you animate a model that uses the multicore profile,
you can view core allocation of instances in your animated sequence
diagram. As message arrows move between each instance, core affinity
is shown on the y-axis. The instances at the top of the diagram and
message connectors, lifelines, and states are denoted by the colors
of the cores to which they are allocated. You can modify animation
settings for core allocation using the SequenceDiagram::General::ShowAnimCoreAllocation property.