Enable Additional Screen Zoom Gestures in iOS for iPhone, iPad, and iPod touch

iOS has additional system wide zoom abilities accessible by a gesture, much like OS X’s zoom feature. To use the extra zoom gestures on an iPad, iPhone, or iPod touch, first you’ll need to enable them in iOS:
- Open Settings and tap on General
- Scroll down to “Accessibility” and tap on “Zoom”, flick the switch to ON
- Verify the zoom gesture works by using a three fingered double-tap on the screen

Once zoom is enabled, using three fingers you can:
- Double-tap with three fingers to activate zoom and zoom in and out on any application
- Double-tap and drag with three fingers up and down to increase or decrease zoom level, from 100% to 500% zoom
- Drag three fingers while zoomed to move around screen
This zoom feature is systemwide and will work in any iOS app running on the device, including even the lock screen, and it works in addition to the standard pinch and spread gestures that are active in many apps already. Standard app functionality also remains while zoomed in allowing for manipulation of onscreen controls and data.

[...] via OSXDaily [...]
Writer Horowitz forgot to mention which version(s) this works in.
Doesn’t work iOS 4.2.1
The wallpaper used in the first screenshots of this article, is it available for download somewhere?
Thanks in advance!
The wallpaper is the default included in OS X Mountain Lion:
http://osxdaily.com/2012/02/16/os-x-mountain-lion-galaxy-wallpaper/
Grab it in high res from here:
http://i.imgur.com/IjL9b.jpg
[...] features have to be enabled separately on a per-case basis, such as text to speech in iOS, screen zoom in iOS and OS X, and the aforementioned closed captioning [...]