Add font, format, size button in CKeditor 4

Question

How to show font, format, size button in tootlbar of ckeditor 4 with existing button ?

I added CKEditor like below.

<script src="https://cdn.ckeditor.com/4.22.1/standard/ckeditor.js"></script>

I am using below code.

var editorConfig = {
      
toolbar: [
    { name: 'basicstyles', items: ['Bold', 'Italic', 'Underline', 'Strike', 'Subscript', 'Superscript', 'RemoveFormat'] },
    { name: 'styles', items: ['Font', 'FontSize'] },
    { name: 'paragraph', items: ['NumberedList', 'BulletedList', 'Blockquote'] },
    { name: 'insert', items: ['Image', 'Table'] },
    '/',
    { name: 'styles', items: ['Format'] }, 
  ],
};


var editor = CKEDITOR.replace('editor', editorConfig);

I am getting output like below.