Open a Design
Go to Colors>>Separate Colors into Layers.
It separates all used colors in the design into individual layers.
To View the Layer Properties:
Double Click on the Layer or click on layer properties icon from the layer window and change the layer name.
Play with different blending modes and opacity of the layer.
To View the History:
Click on the tab next to the Layers to reveal the history of the design. It shows the tools and effects used in the design.