VW Help says that the Slab Drainage tool is suitable for designing not only roofs but industrial floors + concrete pavements yet the Default Drain Symbols in the tool settings are all roof outlets. Is there a way to introduce other symbols such as floor drains for showers/wet rooms or channel drains or industrial floor gullies? You are not taken to the Resource Selector when you choose the drain symbol so it looks like that's the choice + that's it.   What about yard drains for outside