I've lost my preview window ... Was it something I did (unintentionally) ?!

I’m no longer seeing, on the RHS, how my message will actually appear on the forum.

And now I am again … That was strange !? !?

Hi John,
when I answer it will look like this.


and in correction mode:

@John-M Same here @Wolfgang


Yes, t’was curious … It’s working as expected again, now.

Just a quirk, I guess.