如何在ckeditor5中可视化/文本工具栏按钮

如何解决如何在ckeditor5中可视化/文本工具栏按钮

    ClassicEditor.create( document.querySelector( '.editor' ),{
            // extraPlugins: [ AnnotationsUIs ],// plugins: [ Mention,],removePlugins:['Title'],toolbar: {
                items: [

        "alignment:left","alignment:right","alignment:center","alignment:justify","alignment","undo","redo","blockQuote","bold","link","ckfinder","selectAll","heading","horizontalLine","htmlEmbed","indent","outdent","italic","numberedList","bulletedList","mediaEmbed","pageBreak","specialCharacters","restrictedEditingException","strikethrough","subscript","superscript","insertTable","tableColumn","tableRow","mergeTableCells","tableCellProperties","tableProperties","textPartLanguage","todoList","underline"
        
      ],shouldNotGroupWhenFull: true,},mention: {
        Feeds: [
            {
                marker: '@',Feed: [ '@test' ],// itemRenderer: customItemRenderer
            },language: 'en',} )
        .then( editor => {
    window.editor = editor;
    
    
        } )
        .catch( error => {
        
            console.error( error );
  } );
});

缺少哪个工具栏或插件？ 我添加了几乎插入和工具栏项目。 CKEditor 5 没有关于文本/视觉按钮的任何文档。我想添加一个切换按钮，在编辑器中显示 HTML 视图和文本。