When you add an internal
            layer, it includes both a layer front and a layer alpha. When you
            add an external layer that only includes the front, a black layer
            alpha will automatically be created.
         
         To add an internal layer:
         
         
            - Click the Add Layer button at the bottom
               of the Layer Editor. 
            
To add an external layer:
         
         
            - Do one of the following:
               
                  - Select the Add Layer button at the bottom
                     of the Layer Editor then connect an input image to the new layer
                     node's input.
                  
- Drop a composition (or compositions)
                     containing a rendered result onto the Paint node and select Create
                     Layer from the drop gate.
                  
 NoteThe newly added layer
                     has the same format as the linked rendered result. The drop gate
                     is also activated when you drop a tool or files that can be imported.
                     In that case, the new layer is created using the composition format.
                   
NoteTo rename a layer
               node, double-click the Paint tool node. Once inside, select the
               raster layer node to rename. In the Tool Options of the node's UI,
               type the new name in the Name field and press Enter.