Something kinda weird happened, the calculator got stuck in a "programmer mode" (hex digits in buttons etc), which I've never seen before, when I turn it to landscape. And now I can't seem to switch it of for "normal" scientific mode.
I've got a feeling this has to be something really simple, but I just haven't managed to do the right thing. Quitting the calc and restarting it won't help, etc. So what to do?