I don't know your specific tools or situation; however, I know this works for the stl format and I'm thinking it would work for dxf.
1) Export from your CAD program individual layers into separate dxf files 2) On each dxf file use: "File/Load into model..."
Although the File/Load option doesn't show that dxf files (or stl in my case) are supported, they do load. When loaded, they will come in as a different component... Default(2), Default(3)... etc.
At which point, you can change their color, rename them and then use the "Mesh tools/Merge nearby nodes..." option to recombine the nodes. I find it to be very little trouble since I prefer to modify and optimize elements in one component at a time anyway.
Comments
As a temporary work-around...
I don't know your specific tools or situation; however, I know this works for the stl format and I'm thinking it would work for dxf.
1) Export from your CAD program individual layers into separate dxf files
2) On each dxf file use: "File/Load into model..."
Although the File/Load option doesn't show that dxf files (or stl in my case) are supported, they do load. When loaded, they will come in as a different component...
Default(2), Default(3)... etc.
At which point, you can change their color, rename them and then use the "Mesh tools/Merge nearby nodes..." option to recombine the nodes. I find it to be very little trouble since I prefer to modify and optimize elements in one component at a time anyway.
Hope this helps.