Your model is more than just straight lines. SketchUp can help you create curved geometry using arcs. Before you begin drawing arcs, here are a few handy details about the way arc entities work:

Tip: Inserted SketchUp files can now contain Dashed Lines, to learn more about managing those new line types with inserted files, see Working with SketchUp Dashes in Imported Models Whether you want to draw the long arc of history or just a precise section of a circle, LayOut has four arc tools that enable you to draw an arc any way you like:

If you're new to creating documents and presentations in LayOut, a quick tour of the interface and few mousing tips can help orient you to LayOut's basic tools and features. Parts of the LayOut interface, like the Measurements box and some of the mousing tricks, look and feel like SketchUp. Other parts, like some menus and dialog boxes, are unique to LayOut. Ready to tour the interface? Let the following sections be your guide.