Layers

By default, the building elements are displayed in transparent mode so you can see inside the building. You can also apply filters to show or hide certain building elements or storeys by clicking on the filter icon in the viewer. This shows a list of building element types and storeys.

Click on the filter icon and click on Wall and Slab to turn off the display of these building element types. In this case, only elements of type Area are displayed.

Turn on the Wall and Slab elements and now select storey 1. Now all building elements of this storey are displayed.

If you only want to view the walls and slabs you can turn off the Space element type.