Hello. I've just started using the program. But I'm having a problem while drawing the basement. I increased the ground floor elevation to +1 which is my flood height and created a flood with a 1 m wall from 0 elevation. However, the entrance door of my building is at 0 elevation. So when I put a door on the wall at 0 elevation, the ground floor wall comes over the door. How can I find a solution? can you help? I will be glad.