This is exactly what I thought and expected. Jochen's picture tells me exactly what I needed to know.

And, Mike, I know that Backward CAN span multiple devices because it just points back or forward again and doesn't pay any attention to how you got there. What it can't do is span anything with any particular already-laid-out plan...unless you made a macro of page jumps, then instructed the user to hit Back to visit certain pages...hmmm, is there a use for that?

Now, since there is no contrast adjustment at that place, is there a contrast adjustment somewhere else (if you just want to quit answering and force me to look at the manual, I will, eventually)?