Chapter 6 -- ENTITIES Section
LINE

The following group codes apply to line entities. In addition to the group codes described here, see "Common Group Codes for Entities." For information about abbreviations and formatting used in this table, see "Formatting Conventions in This Reference."

Line group codes
Group codes Description

100

Subclass marker (AcDbLine)

39

Thickness (optional; default = 0)

10

Start point (in WCS)
DXF: X value; APP: 3D point

20, 30

DXF: Y and Z values of start point (in WCS)

11

End point (in WCS)
DXF: X value; APP: 3D point

21, 31

DXF: Y and Z values of end point (in WCS)

210

Extrusion direction (optional; default = 0, 0, 1)
DXF: X value; APP: 3D vector

220, 230

DXF: Y and Z values of extrusion direction (optional)