def _update_shown_axis(self):
        index = self._axis_list.selected_row_index
        if not index is None:
            axis = self._axis[index]
            if not axis is None:
                assert isinstance(axis, ControlAxis)

                # Get the hardware type from the name of the class
                self._axis_hw_type.value = type(axis).__name__

                # Update the minimum box
                if not self._min.visible:
                    self._min.visible = True
                self._min.label = "Minimum ({})".format(axis.get_units())
                self._events = False
                self._min.value = axis.get_min()
                self._events = True

                # Update the maximum box
                if not self._max.visible:
                    self._max.visible = True
                self._max.label = "Maximum ({})".format(axis.get_units())
                self._events = False
                self._max.value = axis.get_max()
                self._events = True

                # Update the norm_minimum box
                if not self._norm_min.visible:
                    self._norm_min.visible = True
                self._norm_min.label = "  0% ({})".format(axis.get_units())
                self._events = False
                self._norm_min.value = axis.get_norm_min()
                self._events = True

                # Update the norm_maximum box
                if not self._norm_max.visible:
                    self._norm_max.visible = True
                self._norm_max.label = "100% ({})".format(axis.get_units())
                self._events = False
                self._norm_max.value = axis.get_norm_max()
                self._events = True

                # Populate the special axis combo
                special_axis = ControlCombo(label="Special Axis")
                special_axis.add_item('', '')
                special_axis.add_item("X Axis", 'xaxis')
                special_axis.add_item("Y Axis", 'yaxis')

                if axis == self._xaxis:
                    special_axis.value = 'xaxis'
                elif axis == self._yaxis:
                    special_axis.value = 'yaxis'

                def axis_changed(_):
                    """
                    Called when axis changed
                    """
                    if special_axis.value == 'xaxis':
                        self._xaxis = axis
                        if self._yaxis == axis:
                            self._yaxis = None
                    elif special_axis.value == 'yaxis':
                        self._yaxis = axis
                        if self._xaxis == axis:
                            self._xaxis = None
                    else:
                        if self._xaxis == axis:
                            self._xaxis = None
                        if self._yaxis == axis:
                            self._yaxis = None

                    self._send_events()

                print("Making Special Combo")
                special_axis.current_index_changed_event = axis_changed

                self._events = False
                self._special_axis.value = None
                self._special_axis.value = special_axis
                self._events = True

                # Update the custom config GUI
                self._axis_custom.value = axis.get_custom_config()

                self._save_button.visible = True
            else:
                self._axis_hw_type.value = ''
                self._min.visible = False
                self._max.visible = False
                self._norm_min.visible = False
                self._norm_max.visible = False
                self._special_axis.value = None
                self._axis_custom.value = None
                self._save_button.visible = False
        else:
            self._axis_hw_type.value = ''
            self._min.visible = False
            self._max.visible = False
            self._norm_min.visible = False
            self._norm_max.visible = False
            self._special_axis.value = None
            self._axis_custom.value = None
            self._save_button.visible = False