Question

What?

Answer 1

When?

Answer 2

I've never seen this before, why is this now here?

Answer 3

You never paid much attention, that's why.

Answer 4

Why does it say live preview.

Answer 5

No, I just noticed it today, and I'm pretty sure it's never happened to me before.

Answer 6

Either your view of OS was completely different than everyone else's and today you just got updated to the new version that everyone else has,

or

you just never noticed it before.

Answer 7

OK, I'll take your word for it. Thanks for your help.

Answer 8

Haha yeah, every now and then I discover functionalities of things I've been using for a long time right in front of my face.

Answer 9

Hmm ya it's always been that way for me :o
Good ole live preview.

Answer 10

Really useful when using the equation editor.

Answer 11

I swear, it has not happened to me before today.

Answer 12

You've always been using Chrome?

Answer 13

Yes, sorry it took me a while to answer, I was busy for a second.