How do I make a rank e.g. 100posts : Advanced Member ?

I can find it anywhere in my forum the ranking option to make the ranks. I can only see Rank Adminstration. I need help asap. thanks.

Edit : I've solved it myself.

Go to:
CP -> Users & Groups -> Ranks -> Rank Administration.

Just don't set as Special Ranks and in the field "Minimum Posts" fill in 100.