selected item covered up by other items...

 From:  Lemo (LEMONNADO)
3588.1 
I am sure I miss a setting.....
When I selected an item like a sphere which is 'behind' a plane, then I could see that the sphere is selected or not previously. Now I installed V2 and all I see is the sphere outline.
If there are many more elements, the selected blends right in and I can't position it with ease any longer. Where can I set that behavior?
Rainer