Schematic sketch of the BPT morphology populations. Upper row: on the right there is a representation of a galaxy with a central region in green, the rest of the galactic body in blue, and an AGN ionization cone in yellow. These regions populate specific areas on the BPT diagram: left diagram: star-forming cloud with two different sizes; middle diagram: AGN-ionized cloud with two sizes; right diagram: mixing sequence elongated toward the AGN area and a mixing sequence elongated toward the LINER area. Middle row: BPT diagram schematic examples for the SF cloud, AGN cloud, mixing sequence and LINER mixing sequence dominated galaxies. Lower row: BPT diagram and spatial map examples for SF cloud and AGN cloud combined with a mixing sequence in one galaxy.