AUTO CAD快捷尺寸标注： DLI                                直线标注DAL                                对齐标注 DRA                                半径标注 DDI                                直径标注 DAN                                角度标注DCE                                中心标注 DOR                                点标注 TOL                                标注形位公差 LE                                 快速引出标注 DBA                                基线标注DCO                                连续标注 D                                  标注样式DED                                编辑标注 DOV                                替换标注系统变量。