In plan view a wall can be set to visible on all relevant stories. For each storey, the wall will display with the doors and windows that belong to that storey. Other openings will not be shown. The wall covering will match the wall symbol, and will show only the openings that belong to the current storey.
In this storey, the window is shown in the wall. The wall covering (green) also displays an opening.
In this storey the window is not visible, and the wall covering continues along the full extent of the wall.