<P>This book is your <EM>AutoCAD 2020 Instructor</EM>. The objective of this book is to provide you with extensive knowledge of AutoCAD, whether you are taking an instructor-led course or learning on your own. <EM>AutoCAD 2020 Instructor</EM> maintains the pedagogy and in-depth coverage that have always been the hallmark of the Leach texts. </P>