> Is there any way to make some graphs in the same level, > like figure 2.1.a and 2.1.b? Yes, try the "subfigure" package. Also, next time try the CTAN catalogue (it's part of MiKTeX or at the CTAN site). > I am using WinEdt. So am I. But as Alex is tired of explaining WinEdt is not TeX. Cheers, Phil