I have installed debian 9 with xfce and compiz. How can I change the theme of gtk-window-decorator?If I understand correctly gtk-window-decorator uses metacity's configuration. So far I have my ~/.themes directory with a few entries in it but I don't know how to activate them. All I could find with search engines is that I should use gnome-tweak-tool but that doesn't work, because it is for gnome3. I also thought of using gconf-editor and somehow find the key for the current theme's name but it is completely empty.I am not married to gtk-window-decorator, I would use emerald if I could but that does not compile.
Change window decoration for XFCE + Ubuntu
debian