The line is the most basic object in AutoCAD. You can create a variety of lines—single lines, and multiple line segments with and without arcs. In general, you draw lines by specifying coordinate points. Lines when created, inherit the current settings from the drawing database, such as layer, linetype and color.
To create a line, you create a new instance of one of the following objects:
Creates a line.
Creates a 2D lightweight polyline.
Creates a multiline.
Creates a 2D polyline.
Creates a 3D polyline.