Thanks to all who commented. That is so nice to be able to do this now. It's very frustrating without the grouping.

Have a great day everyone.

For simplicity I'm going ask my question as if the models I'm working with are boxes.

One box is sitting directly on top of the other and I want to move only one of the boxes. How do I move just one? What happens to me is that even though I select only one box, such as with a window, the parts of the other box that are touching the one that I want to move are dragging along with the move I'm making of the first box. I can't seem to separate them. Is there a way to do this?

Thanks in advance for anyone's help.