IOS 8, iPhone 6, double tap home button?

When I double tap my home button, not click it, just touch it twice, my app or my home screen slide down and it looks like there a little place that would be a notification or something at the top. Then, if I double tap it again it slides back up. What is this supposed to be? Because the space is currently just empty

This is a feature, a horrible feature, that apple added to the iPhone 6 and 6Plus making apps easier to reach so you're hand isn't having to move too far across the screen.

Apple introduced a new gesture called "Reachability," to account for the increased screen size of the iPhone 6 and iPhone 6 Plus. Double touching the home button now slides the entire display down, so that you can access the top software buttons in whatever app you're in. For example, if the "back" button at the top of the Safari web browser is too far away, double touching will slide the entire view down so you can tap it more easily.

I don't think it's a horrible feature. It actually works great when you're using one hand

Isn't the back button at the bottom of safari on the iphone

Chrome already had the buttons on the bottom, so doesn't matter to me

How about ppl with one functional hand.

With my short thumb, I want Reachability on the *5s* so I can upgrade from my 4s. Till then… Eh, the 4s works fine and I can reach my thumb across the screen with the phone in a solid case without changing to a less-secure grip.

Hmm, ok mystery solved. I had to google this to figure it out why my display "slid" down unexpectedly. Well I guess if I have trouble "reaching" the top of my screen I'll know what to do now.

You can turn this off under General/Accessibility/Reachability

Have to confess I hate this feature. For years have wanted to know how to disable it. Just followed prior guest advice, but can't find it under General/ accessibility/ reach ability

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