1.Firstly finish the room with an entrance door. Normally it’s a living & dining room.
2.Tap the left bottom icon “Parts”, select the right door type and drag it to the right place. Adjust the door size accordingly.
3.After the door’s size & location are confirmed, pay attention, the room must start from one of the door terminals and end with another door terminal.
4.The room can then be adjusted to the desired shape and size, so you could draw the shape first and confirm the dimensions later.