CST - Plasma Applicator...how to model "layer" in CST MWS?

Hi..this is urgent....please, if anybody knows the answer, let me know.

I downloaded a model from the component library of CST MWS called "Plasma Applicator." In this model, the designer has modeled layers of plasma. When I check in the "History List" of CST, it shows "Layer" instead of "Component". When I model the same design, all my shapes, like brick or cylinder, etc., are created as "Components" instead of "Layer." So my question is how to create a "Layer" in CST MWS. Are "Component" & "Layer" the same in CST? Kindly help me asap. Thanks

CST Studio Suite ​​​​​​​