When saving files, you can either set up a line type conversion table or choose to convert all ARCHICAD line types to a single type in AutoCAD named BYLAYER.
Note that symbol line types are stored differently in ARCHICAD and in AutoCAD. Due to these differences, some of ARCHICAD’s symbol line types will not look the same in AutoCAD.
Set All Elements’ Line Types to BYLAYER: This checkbox is available only during Save. It overrides the effect of the Linetype-linetype conversion dictionary.
When this check-box is checked, every saved entity will have line type BYLAYER. When the AutoCAD user changes the line type attached to a layer, everything on that layer will change its line type accordingly.
Keep Existing Line Types on Open: If you check this checkbox, ARCHICAD will keep line types currently defined and also import line types defined in the imported DXF/DWF file. In this case, if the DXF/DWG file contains line types with the same name as line types existing in the currently open ARCHICAD Project, the line types of the DXF/DWF file will not be imported.
If this checkbox is not checked, all line types from the DXF/DWG file will be imported, and none of the existing ARCHICAD line types will be kept.
LTScale value in output field: Set the LTScale to the desired value.
The LTScale variable used in DWG files are correctly interpreted when opening or merging DWG files in ARCHICAD. New line types will be created as needed, regardless of the length of the original line pattern.
This conversion dictionary works exactly the same way as the layer-layer conversion except that it deals with line types. The only condition restricting its use is the option “Set all Elements’ Line Types to BYLAYER.
You can pick the requested line type name from the pop-up list. Its name will appear in the ARCHICAD line type field. In the AutoCAD line type field, type the name of the line type you would like this ARCHICAD line type to be converted to in the resulting DXF/DWG drawing. Or vice-versa: from this line type, ARCHICAD will create a line type specified in the ARCHICAD line type field when opening DXF/DWG files.