Chapter  1  Introduction  to  AutoCAD  3  Copyright  Goodheart-Willcox  Co.,  Inc.  Before  You  Begin  Before  You  Begin  Designing  and  drafting  effectively  with  a  computer  requires  a  skilled  CADD  oper-  ator.  To  be  a  profi  cient  AutoCAD  user,  you  must  have  detailed  knowledge  of  AutoCAD  commands  and  processes,  and  know  which  command  and  process  is  best  suited  for  a  specifi  c  task.  You  must  also  understand  and  be  able  to  apply  design  and  drafting  systems  and  conventions  when  using  AutoCAD.  As  you  begin  your  CADD  training,  develop  effective  methods  for  managing  your  work.  First,  plan  your  drawing  sessions  thoroughly  to  organize  your  thoughts.  Second,  learn  and  use  industry,  classroom,  or  offi  ce  standards.  Third,  save  your  work  often.  If  you  follow  these  procedures,  you  will  fi  nd  it  easier  to  use  AutoCAD  commands  and  methods,  and  your  drawing  experience  will  be  more  productive  and  enjoyable.  Planning  Your  Work  A  drawing  plan  involves  thinking  about  the  entire  process  or  project  in  which  you  are  involved.  Your  drawing  plan  focuses  on  the  content  you  want  to  present,  the  drawing  sessions:  Time  spent  working  on  a  drawing  project,  including  analyzing  design  parameters  and  using  AutoCAD.  Figure  1-2.  A  3D  AutoCAD  model  of  a  mechanical  assembly.  A—A  wireframe  visual  style  (left)  and  a  conceptual  visual  style  with  color,  lighting,  and  texture  (right).  B—A  hidden  visual  style  (left)  and  the  same  display  viewed  at  an  alternate  angle  and  zoomed  in  (right).  Wireframe  Visual  Style  Hidden  Visual  Style  Alternate  View  Angle,  Zoomed  to  Specific  Area  Conceptual  Visual  Style  A  B