Accessibility Built Into iOS 6

Macworld article with detailed information on accessibility in iOS 5
(Most iOS 5 info also applies to iOS 6)
iOS 6 Accessibility Features Overview by Luis Perez
Turning on Accessibility Features
  • All accessibility features are off by default and must be turned on in Settings
  • In Settings, select 'General'
  • Under 'General', select 'Accessibility' 
Vision Accessibility Supports
VoiceOver
  • For blind users, or those with low vision
  • Auditory feedback allows user to navigate and use the touch screen
  • Eg. touch an icon once to hear what it is, double-tap to activate it, use three-finger flick to scroll pages
  • How-To Guide for Using VoiceOver in iOS 5.1
  • Must be turned on in Settings (General -- Accessibility)
Zoom
  • Zoom screen in or out by double-tapping with three fingers
  • Move around zoomed screen by dragging with three fingers
  • Zoom must be turned on in Settings (General – Accessibility)
Large Text
  • Use Large Text to set font size from 20 – 56 pt in Calendar, Contacts, Mail, Messages, Notes
  • Must be turned on and set in Settings (General -- Accessibility) 
Invert Colors
  • Inverts screen colours
  • Must be turned on in Settings (General – Accessibility)
Speak Selection
  • Reads selected text aloud 
  • Must be turned on in Settings (General -- Accessibility)
  • Words may be highlighted as spoken
  • Does not work PDF's and most eBook readers
  • Excellent video overview by Luis Perez
Speak Auto-Text
  • speaks any auto-corrected or capitalized text
  • must be turned on in Settings (General – Accessibility)
Learning
Guided Access
  • User can be restricted to a single app
  • Selected parts of the touch screen may be disabled
  • Easy to set up and use
  • Must be turned on in Settings (General -- Accessibility)
Physical and Motor
Assistive Touch
  • For individuals with limited physical dexterity
  • Set custom gestures, using two to five fingers, to control device
  • Must be turned on in Settings (General – Accessibility)
Home-click Speed
  • Adjusts the speed required to activate Double and Triple-click Home
  • Default / Slow / Slowest
Triple-click
Triple-click Home
  • Set triple-click home button to activate VoiceOver, Invert Colors, Zoom or Assistive Touch
Other iOS Features that Support Access
Siri
  • Voice activated "personal assistant" that can control apps, and obtain information
  • Works with VoiceOver in iOS 6 (not iOS 5 and earlier)
  • Optimized for iPhone, but works with other iOS devices
Reader in Safari Web Browser
  • Eliminates distracting clutter (ads, side-bars, etc) from web pages
  • Allows for adjusting size of font on de-cluttered pages