[bluepeter]

I know how to lock the orientation of my Libra H2O's screen to portrait. That's easy enough. But it still keeps turning upside-down if I tip the screen just slightly away from me.

I always hold my e-reader in my left hand, so I'd like the orientation to be completely locked down with the page-turn buttons always to the left of the text. I don't want it to rotate at all.

Is this possible? If so, how?