Three options as per video is not appearing for me. In preview mode component with error is hidden.

I have implemented as per video. The issues I am having is component with error is not appearing as per screenshot/video. It is hiding in preview mode. 

I am using AEM 6.0. Using ACS commons for error handler implementation.404 error is working find but 500 error is not working. I am trying to break test by breaking a component with error. But it is not working,Configuration I am using :<?xml version="1.0" encoding="UTF-8"?> <jcr:root xmlns:sling="h...