mgrib(grib_field_position = 1, grib_input_file_name = "2m_temperature.grib") mcont(contour_label_height = 0.40, contour_level_selection_type = "interval", contour_label_frequency = 1, contour_line_colour = "red", contour_highlight_thickness = 2, contour_highlight_frequency = 5, contour_label = "on", contour_min_level = -100.00, contour_max_level = 100.00, contour_highlight_colour = "red", contour_hilo = "off", legend = "on", contour_interval = 2.00, contour_line_style = "dash")