CKEditor4 destroy, not preserve original HTML content. How to disable filters?

Question

I am using the standard demos, like this. So, the main options (little changes) can be flagged at config.js.

Example when edit by source-code-HTML (button

Answer 1

At config.js you can add something like,

  CKEDITOR.config.allowedContent=true;

see "Advanced Content Filter" (ACF) and how to enable/disable it.