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, figure_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:
        '''
        # if there is not image data get it from the current plot
        if not self.data == {} and self.data['image_data'] is  None:
            axes = figure_list[0].axes[0]
            if len(axes.images)>0:
                self.data['image_data'] = np.array(axes.images[0].get_array())
                self.data['extent'] = np.array(axes.images[0].get_extent())
                self.plot_settings['cmap'] = axes.images[0].get_cmap().name
                self.plot_settings['xlabel'] = axes.get_xlabel()
                self.plot_settings['ylabel'] = axes.get_ylabel()
                self.plot_settings['title'] = axes.get_title()
                self.plot_settings['interpol'] = axes.images[0].get_interpolation()

        Script.plot(self, figure_list)