To create a curve with specific radius dimension is called arc. The arc is created by the selected point’s position in the drawing.

Layers in AUTO CAD software plays major roles in understanding of part’s design. Part models assign to layers for checking of each sub parts.

Draw toolbar has a commands and it located at selection bar. Draw commands are used for drawing of objects such as lines,constructed lines, poly line, polygon,rectangle,arc,circle, ellipse and ellipse arcs.

Modify toolbar has a interface of edit commands which are used to edit the existing drawing.  Modify toolbar located at the selection bar.