Step 1: Know your environment I used Drupal 8.2.7 for this blog post demonstration. You need to find out which CKEditor version your Drupal is using in order to download the appropriate version of the plugin. There are several ways to find out your CKEditor version: Find the ckeditor.js file inside Drupal code and search for "version." You will find it beside the "timestamp". Go to a page on your site that has a CKEditor, open your browser inspector, and find the ckeditor.js file as shown below: Step 2: Download your CKEditor plugin Update: Please read first Managing CKEditor plugins using...