Three panels illustrating changes in log M_*, 10 and Γ_*, 10 induced by mergers. Different colors represent distinct Γ_*, 10 values of the main galaxy. Each data point corresponds to a particular run of simulations. For merger mass ratio ξ = 1, two sets of simulations with two runs in each set are shown. For the other two values of ξ, three sets of simulations are shown. Some data points overlap, hence the number of visible data points is smaller than the number of runs.