this feature is completely broken.
- when dividing a room, why can you select multiple rooms?
- sometimes when moving the dividing line it says "place line inside the room to be divided" when there are clearly parts of the room on either side of the line.
- sometimes when clicking the tick mark when dividing a room it says "Reset failed"
why don't you just allow us to draw a rectangle and assign the enclosed are to a particular room, instead of all this line-drawing nonsense?