Evolution of the global properties. From the top to bottom: R_tid, M_tid, R_h, R_c, and a_BBH, for the models with similar properties at 32 Myr to those in the OB-max model. The columns separate the models with different M₀. For each M₀, a brighter color indicates a higher total mass of BHs (M_BH). The half-mass relaxation times (T_rh) at 32 Myr are shown in the second row of panels. The values of M_BH and the corresponding numbers of BHs (in brackets) are shown in the last row of panels.