[judd5000]

Just discovered this and I'm sad enough to think it is worth noting - If you put your Z10 into sleep mode and then exit sleep mode you are left on the lock screen, then you can pull the lock screen up half way and return it down dragging your finger off over the bezel and it will turn off the screen. I already new about the lock screen but didn't know the bedside mode left you at it.

I'm only mentioning this as I bought a casemate tough case the other week and have been unimpressed by the stiffness of the power button.

[SteveLawUK]

That works without going into sleep mode first, you just have to be at the lock screen.