After using Xfwm4 in gnome as WM the System > Preferences > Windows outputs the following error: "Window Manager 'Xfwm4' has not registered any configuration tool" It's missing a .desktop file inside the folder: /usr/share/gnome/wm-properties That would allow gnome to run the xfwm4-settings tool. Example: xfwm4.desktop -- [Desktop Entry] Name=Xfwm4 Exec=xfwm4 # name we put on the WM spec check window X-GNOME-WMName=Xfwm4 # our config tool ConfigExec=xfwm4-settings --