Distributions of FG (red) and SG (blue) stars projected onto the x–y plane for eight selected GCs. The model number and GC ID are given in the upper right corner for each panel. For example, “M15-GC4” means that this GC is GC4 in the model M15. The thick bar in the lower left corner for each panel indicates a size of 10 pc. The three GCs with green circles (M15-GC4, M2-GC1, and M6-GC2) are binary GCs with smaller companions, and the location of a companion GC is shown by a green circle.