May 8, 2016 at 8:10 PM
Is it possible to create sub-layers with this API? I ask because my CAD software supports creating a layer with a designated parent layer to nest them. I see that the Owner property is read-only and can't be set.

Is this possible, and I am just missing something?

May 8, 2016 at 8:37 PM
Duh. I decided to open an existing dxf file and figured out how to do it. It is simply the name. "Parent Layer ... Sub-Layer".
Marked as answer by JimFoster on 5/8/2016 at 1:37 PM