Individual histories of the half-mass radius (top), inner sSFR (second row), and the ratio between the sSFRs in the inner and outer regions (bottom) for five randomly selected Normals (left), Compacts_MB (center), and Compacts_SB (right). Each line corresponds to the evolution of a single galaxy. The symbols indicate major mergers (large circles, with stellar mass ratio > 1/4) or intermediate mergers (intermediate-size squares, with stellar mass ratio between 1/10 and 1/4). The minor mergers are not shown for clarity. Thicker lines indicate when the galaxy hosts a central BH. The thick black lines show the evolution of the softening radius, while the gray shaded regions show the ±1σ region for the sSFR median evolution of all galaxies in the stellar mass range: 8.4 < log(M_⋆/M_⊙) < 9.2.