I_e − R_e plane of our model galaxies compared with the observational data of Burstein et al. (1997). The color-coding of the data is the same as in previous figures. There are two groups of models. The black thin dashed lines are models with original radii, while the thick lines made of filled black squares are those with the radius decreased by a factor of 4 and the specific intensity I_e increased by a factor of 16. The galaxy mass is M_B(T_G) equal to 10⁶, 10⁸, 10¹⁰, and 10¹² M_⊙ (from left to right). Along each line the time runs from zero to present age (from top to bottom). The formation redshift of all the models is z_for = 10.