Switching U & Z designations using a Ruida controller

I have a ruida controller, RDC6432g to be specific. the controller itself has x y and u axis, but the HMI sees the U axis as a Z axis, which is what i am actually using it as.

the problem i run into using lightburn, is that it thinks that i have XY and rotary(?) axes and no z. is there a way to designate what each axis is and assign it a user defined definition? so i can tell it that even though it is called a “U” axis is actually my Z?