This plugin makes it easy to add RichText toolbar button. 日本語の説明 GitHub (More details) Issues (Reporting a new bug or feature request) This plugin needs PHP5.6 or higher. You can add formatting buttons which have any tag name and class name to the rich text toolbar as many as you like. You can make some groups to add dropdown list instead of button. You can use not only inline text and background color panels but also inline font size panel.