The  command rotates the
    selected layers by 180° around the center of the layers, with no loss of
    pixel data.
  
      
    The shape of the layer is not altered. Since the layers have
    a rectangular shape, a 180° rotation only inverts them and they can't
    extend beyond the image limits.
  
      
        
        
          You can access this command from the main menu through
           →  → .