I just upgraded to 13.04 from 12.04. I was wondering how to use both of my monitors side by side in 13.04. They work together in mirror but do not work side by side. I have looked through the "tweak" app and "compiz" and do not see the correct setting, am i missing something. Additionally when I deselect the mirror button in the display app I lose the launcher and the title bars on my window and the ability to change windows. Pretty scary stuff since 12.04 did not have this problem. Please help..... I am online watching this post like a hawk so if you have any questions or need additional information please let me know.