Thank you, Emmanuel. I will try this.

Sorry, i just have found what thid parameter doing. "Sets whether the area of this room is visible or not." in javadoc, it response for label on room.

Hans, thank you for your help.
Can you explain me what means parameter floorVisible in Room class in model package?

<t>It will be require do this work each time when i need to make a mark. I think to add new button near "Create rooms" which call method the same as room creating. My question is how to do an object like room, but without displaying it in 3dview. May be it possible to add some properties to Room ...

Unfortunately it is not what I need. Thank you for your help, i will continue my attempts.

If i will add new room to plan and change it color, it will be displayed at 3d plan, but I want to display polygon only in 2d plan, same as text label.

Sorry for my English and thank you for your answer.

I want to to mark various places in 2D plan with polygons of different colors. I think, this idea is the same as room, but I don't understand how to realize this. How to do this?

Best regards
Ilya