I was forced to work in CATIA, before that made models of the Moi, so I will say that the MoI is similar to the module in the CATIA which is called Freestile , it is designed for industrial design, and in the Moi and Freestile convenient to work with the Moi and in Freestile few buttons. Here we have a picture of the number of all the buttons of this module Freestile note here the key is not only modeling , and analysis, so the buttons for modeling, still smaller than in the picture: