Using the Layer View in Drawings

Hello
Brand new with SpaceClaim, I was forced to draw a drawing.
In order to have a better understanding of the system, I want to attach in a first sheet the environment in which my assembly will be.
However, I want to differentiate the environment from the parts that are going to be defined. To do this, I created different layers by putting different colors, thickness and style of strokes.
Unfortunately, when I do my drawing, all my strokes are identical. I can't get this element to display at all with the characteristics of the layer it belongs to.

Could you tell me how I can do this?

Thank you in advance for your help,