The  command lowers the active
    layer one position in the layer stack. If the active layer is already at
    the bottom of the stack or if there is only one layer, this menu entry
    is insensitive and grayed out.
  
      
        
          
            
              7.18.1. Activating the Command
             
           
         
        
          
            - 
              
          You can access this command from the image menubar through
           →  → ,
         
- 
              
          or by clicking on the down-arrow icon at the bottom of the Layers
          dialog.