Assume that you have the following model, and the chart has two states:
Suppose that you want to reduce the compilation time of the chart for simulation. You can convert state A to an atomic subchart. Then you can make changes, one by one, to state A and see how each change affects simulation results. Making one change requires recompilation of only the atomic subchart and not the entire chart.
Right-click state A and select Group & Subchart > Atomic Subchart.
Double-click the atomic subchart.
The contents of the subchart appear in a separate window.
Side-by-side animation for the main chart and the atomic subchart occurs.
In the atomic subchart, change the state action for
Recompilation occurs only for the atomic subchart and not the entire chart.