AutoCAD 2010 is designed to work in a Windows operating system. In general, to open AutoCAD 2010, either left-click on the AutoCAD 2010 shortcut in the Windows desktop (Fig. 1.1). Depending on how details in Initial Setup … in the Options dialog (Fig. 1.20, page 16), the Initial Setup dialog (Fig. 1.2) may appear. This dialog is in three pages, two of which are shown in Fig. 1.2. The settings shown in Fig. 1.2 are for most of the 2D drawings in Part 1 of this book.