Urgent question, how to correspond to the picture according to the sofa template when cutting the sofa? Such as back frame, ears, base, direction?

First of all, we should know the names and directions of each part of the sofa. Sofa consists of armrests, seats, backrests and sofa feet. The names of all parts of the sofa are added with directions. The direction of the handrail is front, back, inside, outside and face, and the names of each part of the handrail are: front, back, inside, outside and face. The same is true for the seat and backrest. The direction of the seat is front, back, face and sides; The direction of the backrest is up, middle, down, back, face and sides.