My friend's cat just walked across her keyboard and now her screen has turned 90 degrees - meaning that everything is on its side. Anyone know which key will correct this?

Is this a PC or laptop? If it is a PC the monitor usually will have small buttons on the front of it that were brushed up against that can be reset to correct the problem. If it is a laptop. What is the make & model? Let us know.

It's a laptop. She uses Mozilla Firefox. I just read another answer elsewhere that said to try alt + delete + up arrow.

I just asked her for make and model but she hasn't responded yet.

She has a Dell Insperion.

She tried the up arrow response and it didn't work. "Neither the up or down do anything and the left and right switch between pages."