In the process of remastering customized Xubuntu, I spent lots of time to identify the location of config file of Menu and Panel of Xubuntu. Usually files should be located to /etc/skel, but xfce seems to have different policies.
The menu settings is stored in
~/.config/menus/xfce-applications.menu
and the panel settings is stored in
~/.config/xfce4/xfconf/xfce-perchannel-xml/xfce4-panel.xml
And the system-wide settings are stored in the locations below.
/etc/xdg/xdg-xubuntu/menus/xfce-applications.menu (menu)
/etc/xdg/xfce4/xfconf/xfce-perchannel-xml/xfce4-panel.xml (panel)
/etc/xdg/xfce4/panel/* (panel)
You also need to copy some files in home directory to /etc/skel.
So if you want to reflect your personal customization in system-wide setting, you need to type the following from the terminal.
sudo cp ~/.config/menus/xfce-applications.menu /etc/xdg/xdg-xubuntu/menus/ sudo cp ~/.config/xfce4/xfconf/xfce-perchannel-xml/xfce4-panel.xml \ /etc/xdg/xfce4/xfconf/xfce-perchannel-xml/ sudo cp -r ~/.config/xfce4/panel /etc/xdg/xfce4/ sudo cp -a .config .gconf .gnome2 .local .bashrc /etc/skel sudo cp -a ./Desktop /etc/skel/ cd /etc/skel sudo chown -R root:root .config .gconf .gnome2 .local .bashrc Desktop