Hi, I'm developing PHP based application which need a wysiwyg form in it. so i decided to use ckeditor. I've done with the original installation, it working properly. But i need to add mathJax pluggin, the installation is not working. Not only the mathJax icon (sygma) not appear, even all the menu of ckeditor disappear. What i've done is: 1. extract the mathJax folder and put it in pluggin folder 2. I've made some editing in config.js to run the mathJax, as shown below CKEDITOR.editorConfig = function( config ) { // Define changes to default configuration here. For example: // config.language = 'fr'; // config.uiColor = '#AADC6E'; config.mathJaxClass = 'my-math'; config.extraPlugins = 'mathjax'; config.mathJaxLib = 'http://cdn.mathjax.org/mathjax/2.6-latest/MathJax.js?config=TeX-AMS_HTML'; }; Code (JavaScript): The CKeditor documentation says that since version 4.x, the mathJax library should be defined manually with the full path. I did it like the last line above. Please help me to solve this problem Thank You