Use the Move Tool to arrange furniture in a room, including moving and rotating objects to align them to the walls.

One of the most important things you can do when it comes to working with CAD files within SketchUp is learn to model walls accurately and efficiently. There are a number of different ways to accomplish this, but we think Mike's come up with one of the best methods out there: Learn to use the Rectangle Tool, Move Tool and the Push Pull Tool to get a set of Exterior Walls modeled ASAP.