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...
Daddy wasn't there...
To take me to the fair...
To change my underwear...
Daddy wasn't there.