Your iPhone includes a native feature known as Reachability that makes it easier to operate your device with just one hand. It works by sliding the handset’s interface down to thumb level, making it so that you can tap objects that would typically reside at the very top of your screen.
As useful as Reachability can be, Apple assumes one size fits all and that their out-of-the-box experience will be right for everyone. Fortunately, jailbreakers can now take advantage of a newly released jailbreak tweak called Ability by iOS developer Ethan Whited to tailor the native Reachability interface to your needs.