How to change Menu Opacity in Ubuntu 12.10

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http://askubuntu.com – I know how to change the Opacity of the task bar in Unity on Ubuntu 12.10 VIA Compiz. My question is, is there a way I can change the Opacity of the Menus? See, in the image below, it shows the App Bar that it almost transparent. But, on the Calendar, it is mostly black. I would like to make it match the App Menu and all other menus. (HowTos)