in a simple way see (image 1 ) that showing name of layer syntax that should be in your Autocad files you send it to us and sure to get your result you are looking for
Image 1 hidden Syntax
In this layer, accessories that are outside the required list in syntax are added, meaning their elements are not used and unwanted, for example see (image2).
This layer is a necessity. Its presence on each floor, and the outer ground boundaries of all floors must be unified, placed in this layer according to each floor, and when placing the floors on top of each other, everything must be in its correct place.
Image 2 Example hidden layer
Image 3 Important for hidden layer