Спасибо, работает! Можно ещё кнопок добавить. Открываем config/config_redaktor.php, находим
plugins: "safari,advimage,advlink,inlinepopups,preview,table,searchreplace,paste,fullscreen,insertdatetime,media,visualchars",
theme_advanced_toolbar_location: "top",
theme_advanced_buttons1: "link,unlink,image,forecolor,backcolor,|,sub,sup,|,hr,charmap,|,undo,redo,|,bold,italic,underline,strikethrough,|,justifyleft,justifycenter,justifyright,justifyfull,outdent,indent,blockquote,bullist,numlist",
theme_advanced_buttons2: "media,insertdate,inserttime,|,tablecontrols,|,pastetext,pasteword,selectall,visualchars,|,search,replace,|,fullscreen,|,preview",
theme_advanced_buttons3: "",
plugins:"safari,pagebreak,style,layer,table,save,advhr,advimage,advlink,emotions,iespell,insertdatetime,preview,media,searchreplace,print,contextmenu,paste,directionality,fullscreen,noneditable,visualchars,nonbreaking,xhtmlxtras,template,inlinepopups",
theme_advanced_toolbar_location: "top",
theme_advanced_buttons1 : "save,newdocument,|,bold,italic,underline,strikethrough,|,justifyleft,justifycenter,justifyright,justifyfull,fontselect,fontsizeselect",
theme_advanced_buttons2 : "cut,copy,paste,pastetext,pasteword,|,search,replace,|,bullist,numlist,|,outdent,indent,blockquote,|,undo,redo,|,sub,sup",
theme_advanced_buttons3 : "forecolor,backcolor,|,hr,removeformat,visualaid,charmap,emotions,iespell,media,advhr,|,print,|,ltr,rtl,|,fullscreen",
theme_advanced_buttons4 : "insertlayer,moveforward,movebackward,absolute,|,styleprops,|,cite,abbr,acronym,del,ins,attribs,|,visualchars,nonbreaking,template,pagebreak",
theme_advanced_buttons5 : "insertdate,inserttime,preview,|,tablecontrols",
theme_advanced_buttons6 : "link,unlink,anchor,image,cleanup,help,code",