Sets the display of all model layers when a model is introduced for the first time to the drawing.
yes* - All the model layers are displayed.
no - All the model layers are hidden.
To set the display state of layers when switching layer tree display from drawing to view, if no explicit display state is set in the context of the view, use the
configuration option def_shown_layers_in_view.
To set the display state of layers when switching layer tree display from drawing to view, if no explicit display state is set in the context of the view, use the
configuration option def_shown_layers_in_view.