1. From the Home screen, tap Settings.
   
2. Tap Messages.
   
3. Adjust the settings as desired.
   Note: Available options vary when iMessage is turned off.
   
4. To change the display settings for message notifications, go to Settings.
   
5. Tap Notifications.
   
6. Tap Messages.
   Note: Learn more from Apple website: http://www.apple.com/ios/messages/