for iOS 9.1 software

Choose your rotor options. Go to Settings > General > Accessibility >
VoiceOver > Rotor, then select the options you want to include in the
rotor.
The available rotor options and their effects depend on what you’re
doing. For example, if you’re reading an email, you can use the rotor to
switch between hearing text spoken word-by-word or character-by-
character when you swipe up or down. If you’re browsing a webpage,
you can set the rotor to speak all the text (either word-by-word or
character-by-character), or to jump from one item to another of a certain
type, such as headers or links.
When you use an Apple Wireless Keyboard to control VoiceOver, the
rotor lets you adjust settings such as volume, speech rate, use of pitch or
phonetics, typing echo, and reading of punctuation. See
.
Use the onscreen keyboard
When you activate an editable text field, the onscreen keyboard appears
(unless you have an Apple Wireless Keyboard attached).
Activate a text field. Select the text field, then double-tap. The insertion
point and the onscreen keyboard appear.
Use VoiceOver
with an Apple Wireless Keyboard