Invisible Drawing Model Items
Items in the drawing model are visible by default unless one of these conditions is met:
• The item is included directly on a drawing layer.
• The item is on a part or assembly layer with the same name as a drawing layer and the Detail option draw_layer_overrides_model is set to yes.
• The item is on a part or assembly layer that has been included in a drawing layer.
For these three cases, the drawing layer status information determines whether to show the item.