How to disable desktops on 2nd monitor ubuntu 12.04 ?

Question

ubuntu

Good day.
There are 2 monitors. Unity shell.
It is necessary that desktops are not used on the second monitor, only on the first (main).
And the second is static, as an auxiliary.
Otherwise, it turns out like this:

what actually is not comme il faut for me))
In Gnome 3 there was a separate "tick" on this score, I did not find one in the unit.
I tried to look for similar options in both ubuntu-tweek and compizconfig, but without success.
Similar topics and answers Google also did not dig up.
Help, can anyone come across?
System 12.04.

Answer 1

"ubuntu-tweek and in compizconfig" as they say "Around the bush", two times they were aiming in the wrong direction. You need the Unity Tweak Tool, you can download it from the app center. I think there is no point in explaining, because there is an intuitive interface. In the window manager you can find what you need. Good luck