It would be nice to have a way to convert an import DXF file and then convert that shape to solid region or copper area. Then you will use that converted shape as usually do with copper area or solid region.
Currently if you need fine dimensions or a custom shape i.e. arcs (round corners) it's not easy to do it with the given tool of dragging dots around manually.
Im working on a custom shape PCB and I find it very hard to manually create NPTH type with Solid regions for cutting out pieces inside a PCB.
![Solid Region][1]
[1]: /editor/20180203/5a757411d0f4e.png