Simplify the appearance of your Simulink^® models with subsystems. This video walks through how to easily create a subsystem and reorganize model hierarchy. You will also walk through an example that outlines how to mask your subsystem in order to change its appearance, add an interface to change parameters, and write documentation.Simplify the appearance of your Simulink^® models with subsystems. This video walks through how to easily create a subsystem and reorganize model hierarchy. You will also walk through an example that outlines how to mask your subsystem in order to change its appearance, add an interface to change parameters, and write documentation.