Use the Duplicate Bitmap Layer 
button to duplicate a selected bitmap layer. In doing so, the contents of the original layer and its associated settings are reproduced on a new layer.
To duplicate a bitmap layer:
- In the Project Tree, select the layer you want to duplicate. The name is bold and highlighted, and its panel is displayed below the splitter bar.
- On the panel, click . The duplicate layer is created above the active layer in the stack. It is given the name of the active layer along with the Copy suffix. For example, Bitmap Layer Copy.