How to increase the text size in iOS 7 for iPhone/iPad/iPod Touch

• To activate the 'Accessibility' features on your device select 'Settings' + 'General' + 'Accessibility'.
• ‘Larger Dynamic Type’ became available on the following devices:
  • iPhone 4s or later
  • iPad 2nd generation or later
  • iPad mini
  • iPod touch (5th generation)

‘Larger Type’ allows you to view larger text in your mail, notes, contacts, messages and calendars.

• Tap to select the ‘Larger Type’ button.

‘Larger Dynamic Type’ adjusts your preferred reading size for any apps supporting this feature. To enable this:

• Tap the toggle switch for ‘Larger Dynamic Type’.

• The ‘Dynamic Type’ options will appear. Tap (or tap and drag) an option on the slider to select your required font size. VoiceOver users should swipe up or down with one finger to select a font size. The slider allows the font size to be increased (or decreased) using increments (or decrements) of 10% within the range of 0–100%.