Hello, for free modeling to place doors and windows, you can select the model door from Hard Decoration - Others - Doors, and the model glass window from Hard Decoration - Components and Hardware - Screen Partitions. You can freely control the placement with the Z key. If you need door and window styles, please follow the following operations:

1. First, make a rectangular opening (i.e., the size of the door and window) on the wall in free modeling;

2. Drag a column and place it at the position of the free modeling opening, and then add the door and window on the column. (The size of the column can be set according to the size of the door and window)