                  + " -- (#{right},#{bottom});", ]
     yield [ 'tex', "% MKTSTBL@26\n", ]
   #.........................................................................................................
-  yield texr '@1', "\\end{scope}"
+  yield texr 'µ22', "\\end{scope}"
   #.........................................................................................................
   yield return
 

@_walk_debug_joints_events = ( me ) ->
  unless @_should_debug me
    yield return
  @_ensure_joint_coordinates  me
  #.........................................................................................................
  yield texr '@1', "\\begin{scope}[on background layer]"
  #.........................................................................................................
  ### TAINT use fixed size like 1mm ###
  for [ col_letter, col_nr, ] from @_walk_column_letters_and_numbers me, 'short'
    for row_nr from @_walk_row_numbers me, 'short'
      x = ( @_left_from_col_nr  me, col_nr ) + 2
      y = ( @_top_from_row_nr   me, row_nr ) + 2
      cellkey = "#{col_letter}#{row_nr}"
      yield tex "\\node[sDebugJoints] at (#{x},#{y}) {{\\mktsStyleCode{}#{cellkey}}}; "
  #.........................................................................................................
  yield texr '@1', "\\end{scope}"
  #.........................................................................................................
  yield return


  bottom    = ( @_bottom_from_row_nr  me, me.grid.height ) + 3
  for col_nr in [ 1 .. me.grid.width + 1 ]
    x = @_left_from_col_nr me, col_nr
    yield texr 'µ18', "\\draw[sDebugCellgrid] (#{x},#{top}) -- (#{x},#{bottom});"
  #.........................................................................................................
  ### TAINT use fixed size like 1mm ###
  left      = ( @_left_from_col_nr    me, 1             ) - 3
  right     = ( @_right_from_col_nr   me, me.grid.width  ) + 3
  for row_nr in [ 1 .. me.grid.height + 1 ]
    y = @_top_from_row_nr me, row_nr
    yield texr 'µ19', "\\draw[sDebugCellgrid] (#{left},#{y}) -- (#{right},#{y});"
  #.........................................................................................................
  yield texr 'µ20', "\\end{scope}"
  #.........................................................................................................
  yield return

