code: def itemconfigure(self, iid, rectangle_options, text_options):
          
          rectangle_id, text_id = self._markers[iid]["rectangle_id"], self._markers[iid]["text_id"]
          if len(rectangle_options) != 0:
              self._timeline.itemconfigure(rectangle_id, **rectangle_options)
          if len(text_options) != 0:
              self._timeline.itemconfigure(text_id, **text_options)
docs: Configure options of items drawn on the Canvas
  
          Low-level access to the individual elements of markers and other
          items drawn on the timeline Canvas. All modifications are
          overwritten when the TimeLine is redrawn.