This dialog appears when you reload a DWG or DXF file, or edit the settings of a DWG/DXF preset.
The File Link Settings: DWG Files dialog gives you control over the detailed aspects of how geometry is translated from DWG or DXF files and interpreted in 3ds Max. It also allows you to control whether only a portion of the 3ds Max objects will be affected by subsequent reloading.
The File Link Settings dialog lets you:
The selections you make in the File Link Settings dialog can affect the amount of memory used by 3ds Max to hold the linked data. Use the Select Layers To Include option to reduce the amount of information added to your scene.
In some cases, it might be more efficient to create multiple links to the same file, making different file link settings for each file.