Can’t change amount space between cells of complex building

Hey guys,

I have a complex building and have problems to change the amount space between the cells.

At the first screenshot you see the building and at the second screenshot you can see the setting. The third shot is the browser elements. Here you see that margin is 30px. But I don’t have this setting anymore.

http://www.monique-nitschke.de/img/first.png

http://www.monique-nitschke.de/img/second.png

http://www.monique-nitschke.de/img/third.png

Maybe I didn’t find the right place to change it?

Thank you very much for your help!