I am relatively new to SW, but I have quite a bit of experience with Inventor. I periodically download 3d drawings from suppliers websites, which are downloaded as SW assembly files. When I open the file the assembly is made up of several parts, but no mates. The assembly is perfect when opened, but you can drag any part out of position at all times. Is there a way of locking or freezing an assembly in place without any mates? I know in Inventor I would just ''ground'' all parts. Wherever the part was with respect to the origin, I would be fully constrained there. Is there a SW equivalent?