XFCE Theme Manager is a useful tool if you want to customize your XFCE desktop theme.
How to Install XFCE Theme Manager 0.3.4 in Xubuntu 13.10
1. Open a terminal window.
2. Type in the following commands then hit Enter after each.
sudo add-apt-repository ppa:rebuntu16/other-stuff
sudo apt-get update
sudo apt-get install install xfce-theme-manager
Image Courtesy of: Linux G
Read more: Linux G