How to keep score layout from changing

I just updated from Cubase 4 to 8 so this question may sound stupid:
How do I keep a score layout from changing? In Cubase 4, I designed a layout and applied it, and it stayed put. In C8, every time I click on a track to edit it, I get a corresponding score change to that track. Every little thing I do in other areas - even the mixer -, changes the score layout. I find this annoying. *I want to change the layout when I choose - not have it always switching around.