This video showns you how to add global menu in xubuntu 14.10 and xubuntu 14.04. In order to add global menu in xubuntu 14.04, xubuntu 14.10 and derivatives, you need to add a ppa:webupd8team/mate to your system. you can do it by typing command :
sudo add-apt-repository ppa:webupd8team/mate
Make ubuntu repository list up-to-date:
sudo apt-get update
Install xfce4-topmenu-plugin
sudo apt-get install xfce4-topmenu-plugin
You can also read – How to install Xfce 4.12 in xubuntu 14.04, xubuntu 14.10, Linux Mint 17 and derivatives