I have an issue in Layout. I created a copper area and assigned it a VCC net on an inner layer. The inner layer is defined as Mixed/Split Plane. I realize that I should have defined the copper area as plane area instead. When I go into the drafting properties of this shape, I see that the dropdown where I can change Copper Area to Plane Area etc, is grayed out. All I can do is change the net. The shape of this copper area is really complex and I would hate to draw it out again as Plane Area. Is there something that I am doing wrong in changing the Copper Area to Plane Area?
The Copper Area shape has various cutouts to make room for other planes.
Any help is appreciated.