Optical diagnostic diagrams for MaNGA galaxies. The black circles in the scatterplot show the emission-line ratio values for all MaNGA galaxies. In colored shapes, we feature the different AGN-selected candidates (see the legend). We took the flux ratio values from the ones measured around their central 2 kpc region (Albán & Wylezalek 2023). In the top panel, the gray line corresponds to the demarcation line from Kauffmann et al. (2003), and the black line (both in the top and bottom plots) corresponds to the ones from Kewley et al. (2001).