| X1 | The x coordinate of the first endpoint of the extension line. |
| Y1 | The y coordinate of the first endpoint of the extension line. |
| X2 | The x coordinate of the second endpoint of the extension line. |
| Y2 | The y coordinate of the second endpoint of the extension line. |
| DimensionLineLocation | The distance from the extension line and the text position. |
| DimensionValue | (Optional) The value of dimension. If omitted the real value is used. (Default value = 0) |
| LayerName | (Optional) The name of the entity's layer. If omitted the CurrentLayer property setting is used. If the indicated layer does not exist in the loaded DXF file an Error 300 ("Layer not found") is generated and the entity is added to the current layer. |
| Color | (Optional) An integer number for 1 to 256 corresponding to the AutoCAD Color Index. If omitted the CurrentColor property setting is used (Default value = 0) |
