Click on each object individually, or click by a left button on your mouse and drag the objects to set them into the group.While it will not completely replace the old method of modeling trim using AutoCAD 3D and attaching it to the equipment, it does make adding some of the most common types of supports a much easier process. It allows you to add trim to your equipment, such as Stiffening Ring, Skirt, Platform, Lug, Leg, Saddle and Body Flange.