How to add class or attribute automatically to img tags in CKEditor?

Question

I\'m using CKEditor version 3.6

I want to automatically add class=\"newsleft\" to any image tag added through the WYSIWYG.

I\'ve seen a few post

Answer 1

in Version: 4.5.3

1. Look up image.js in /ckeditor/plugins/image/dialogs/image.js
2. Search for editor.lang.common.cssClass
3. You will find: editor.lang.common.cssClass,"default":""
4. Edit it with your class name(s) such as: editor.lang.common.cssClass,"default":"your-class-name"