User blog comment:Kirkburn/The expanding world of the VisualEditor/@comment-13918697-20141028074944/@comment-452-20141110132102

The tabs are supposed to be gone when you select source, that's how it has always been.

As for your grammar lesson, I can only assume that you are attempting to state "the change is going to be happening in the future", in which case please read the date on the blog post.