Plots a dot on top of each selected NV, with a corresponding number denoting the order in which the NVs are
        listed.
        Precondition: must have an existing image in figure_list[0] to plot over
        Args:
            figure_list:

def _plot(self, axes_list):
        '''
        Plots a dot on top of each selected NV, with a corresponding number denoting the order in which the NVs are
        listed.
        Precondition: must have an existing image in figure_list[0] to plot over
        Args:
            figure_list:
        '''

        axes = axes_list[0]

        if self.plot_settings:
            axes.imshow(self.data['image_data'], cmap=self.plot_settings['cmap'], interpolation=self.plot_settings['interpol'], extent=self.data['extent'])
            axes.set_xlabel(self.plot_settings['xlabel'])
            axes.set_ylabel(self.plot_settings['ylabel'])
            axes.set_title(self.plot_settings['title'])

        self._update(axes_list)