Difference between general shape design and automotive class a in catia
Hi all,i need a little help,i am trying to model a car in catia,and i cant solve in which part i will do it,now im thinking about automotice class a (ACA) but im not sure how it works,it have some nice 3d lines but after i finish drawing them,i cant edit them like in free style,and there is no combine option,any help?