You can access Etherpad's admin panel at `__DOMAIN____PATH__/admin`. The configuration file for Etherpad is at the path `__INSTALL_DIR__/settings.json`. *Skin Builder* (accessible at this address `__DOMAIN____PATH__/pad/p/test#skinvariantsbuilder`) allows you to customize the skin of your pad. It will give you a parameter to copy into your configuration file `__INSTALL_DIR__/settings.json`.