Unlike these programs, however, SketchUp does not have a grid feature to guide you while you are drawing your models. Instead, SketchUp uses multicolored 3D drawing cues to indicate where the user ...

Working with SketchUp often feels like drawing on the back of a napkin, aided by a powerful computer. Want to make a platform? Just make a rectangle and “pull” it out–voilà, it goes 3D.