Thanks for your reply.
It might be easier for me to send the file. That will explain the setup.
The whole platform consist of 5 platforms with walkway between them. (A,B,C,D and E) each single platform consist of levels. First level from below is cellardeck, next level upwards is called 1.level, and then 2. level...

The idea with the setup is that the control room operater, should be able to navigate through the different levels to see the alarms.

The picture the the left doesn't do anything its just for the overview.
the buttons is the navigation.
Therefore when you click on platform C and level1, all the rest of the total platform should not be displayed.

I dont think I can upload the ppt file with macros. It will not let me do so.

regards,
Jesper