code: def configure(self, event=None):
          
          if self.win_config is not None:
              try:
                  self.win_config.Raise()
              except:
                  self.win_config = None
  
          if self.win_config is None:
              self.win_config = PlotConfigFrame(parent=self,
                                                config=self.conf,
                                                trace_color_callback=self.trace_color_callback)
              self.win_config.Raise()
docs: show configuration frame