diff --git a/3-mid/opengl/source/lean/opengl-texture-coordinates.ads b/3-mid/opengl/source/lean/opengl-texture-coordinates.ads
index a930031..616def8 100644
--- a/3-mid/opengl/source/lean/opengl-texture-coordinates.ads
+++ b/3-mid/opengl/source/lean/opengl-texture-coordinates.ads
@@ -20,6 +20,7 @@ is
 
 
 
+
    --- Generators
    --
 
@@ -29,6 +30,7 @@ is
                             is abstract;
 
 
+
    type xz_Generator is new coordinate_Generator with
       record
          Normalise : texture_Transform_2D;
@@ -39,6 +41,7 @@ is
    function to_Coordinates (Self : in xz_Generator;   the_Vertices : access Sites) return Coordinates_2D;
 
 
+
    type xy_Generator is new coordinate_Generator with
       record
          Normalise : texture_Transform_2D;
@@ -49,6 +52,7 @@ is
    function to_Coordinates (Self : in xy_Generator;   the_Vertices : access Sites) return Coordinates_2D;
 
 
+
    type zy_Generator is new coordinate_Generator with
       record
          Normalise : texture_Transform_2D;
@@ -59,6 +63,7 @@ is
    function to_Coordinates (Self : in zy_Generator;   the_Vertices : access Sites) return Coordinates_2D;
 
 
+
    type mercator_Generator is new coordinate_Generator with null record;
 
    overriding