I am trying to use Coxeter 3.0 (http://www.liegroups.org/coxeter/coxeter3/english/coxeter3_e.html) to perform some computations for affine Weyl groups. I managed to install the program and get it running, but I cannot find any instructions.

I have figured out how to get the program to do some computations for finite Weyl groups (types A, B, etc), but have not figured out the commands for affine types. Does anyone have a link to instructions which explain how to do this, or can anyone tell me how to enter affine types into Coxeter 3.0?

For example, I can enter "type" -> "A" -> "2" to work with type A rank 2 in the finite case. But how do I enter affine type A (untwisted)?

I hope this is an appropriate place to post this request.