File menu > Open > DXF file-type.
When you File menu > Open and select the DXF file-type, you add a DXF element to the Assembly-Tree.
The DXF element is the container for the DXF Drawing.
You can then link that DXF element and DXF drawing to a CAD-Line.
To show a DXF drawing, do two steps:
STEP 1 : File menu > Open > DXF file-type
STEP 2 : Show the DXF Drawing
When you save a DXF drawing in your original CAD software:
•Save the DXF drawing as Release 1, or as near to Release 12 as possible.
•If you use 3D CAD, use Hidden Lines Removed before you save the DXF drawing