And what about the arrow?
It’s pointing down diagonally, which - at least to me (and for pretty much any GUI I can think of) - indicates, that it should be affecting both axes.
Then again, that whole illustration isn’t all that great to begin with. So who knows, what that arrow is supposed to signify…
There’s actually a Jesus Christ Superstar parody told from the view of the innkeeper (featuring The Mighty Boosh’s Noel Fielding and Julian Barratt, Julia Davis, Rich Fulcher, Matt Lucas, Matt Berry and Richard Ayoade):
AD/BC: A Rock Opera