Chapter 7 Computer-Aided Drafting and Design 163
A
B
Figure 7-11 Layers are used in CAD drawings to distinguish different drawing content. A—The object lines,
centerlines, section lines, and cutting-plane line in this drawing are on different layers. Each layer has the
appropriate linetype. The Centerline layer is assigned the color green. All other layers are assigned the color
black. B—The dimension layer is turned on to show dimensions. This layer is assigned the color red.