Hello, the original ceiling of the apartment layout cannot be deleted directly, but you can create an opening by placing a skylight. The operation steps are shown in the screenshots as follows:

1. You can add a skylight. Search for the number "105698702" or "skylight", and directly place the skylight on the ceiling of the apartment layout to achieve the opening effect;

2. If on the ceiling of a space, both an opening and a ceiling design are required, since the new version of the ceiling and wall cannot be opened directly, you need to first create the ceiling shape in the free modeling, and then double-click the surface of the free modeling in the custom ceiling and wall to create the ceiling. The operation animation is as follows: