When we want to open a window space for curtains on the basement floor, there is an elevation section in the window properties section, what should we write in this section as elevation in projects. For example, for a building with a floor height of 3 meters. Another thing I want to ask is; After laying the foundation, we open a space for the elevator shaft from the object part to the floor and turn with the floor edge and lay the floor again. And in the analysis part, do we need to mark a place for this flooring, as in the stairs?