As you create a model in 3D, you need to view it from all sides. In SketchUp, you orbit, zoom, and pan all the time as you draw:

Getting started with SketchUp is easy, and we want to make sure that everyone, no matter their skill level, has all the information they need to begin creating their own awesome models. Whether you are new to modeling and using SketchUp for the first time, an experienced modeler already familiar with CAD software, or even a SketchUp Sage, we have all you need right here to get started making awesome 3D models. 

Note: Style Builder is no longer included when downloading SketchUp and will no longer be supported. For more information see End of Support — Style Builder.In Style Builder’s Preview pane, the default model preview shows off your styles as you add strokes to each set in the Sets pane. This aspect of previewing happens automatically, with no extra effort on your part.