My Casio CFX 9850GC has an OPTN key that lets you select lots of functions that aren't too commonly used. Dunno if yours have a key like that, but try looking for one :p.

Oh, I just checked which model you had, and realized it's not as advanced as the one I have. Nevermind what I said then, probably.

They might just be using the same LCD display for several models to save manufacturing costs.