Before the first time you use a plug-in, you must set the folder where it is located. To set the paths to plug-ins, use Settings | Preferences | Plug-ins window's Add button. To use a plug-in after you have set the path to it, use the Editor's Edit | Plug-ins submenu. Plug-ins each have their own controls and settings. In case of trouble with a plug-in, contact its author or consult its documentation.