The List2D is drawn after the List3D and orthogonally. It is mainly used for HUD rendering text and buttons. The origin 0,0 is top left, the width and height is independently of the current resolution, but defined in window.refsize. New nodes start unlinked and wont be drawn, unless linked to root or another root child. Drawing of l2dnodes is also possible via the rcmddrawl2d part of l3dview rendercommand system.
o-+ l2dlist o-+ l2dnode | o-- l2dflag | o-- l2dimage | o-- l2dnode3d | o-- l2dtext | o-- l2dview3d