Use this procedure to import layer standards from other drawings or from the AecLayerStd.dwg drawing in C:\ProgramData\Autodesk\ACA <version>\enu\Layers folder.
All the layer standards in the drawing are displayed in the External File list.
You can select more than one layer standard in a list by holding down Ctrl while you select the additional layer standards.
If you import a layer standard that already exists in the target drawing, a message is displayed asking if you wish to overwrite the existing layer standard. Click Yes to overwrite the existing layer standard, or click No to cancel.
The layer standards that you imported are displayed in the Layer Standards dialog box.