HTC Desire 820 User Manual page 42

42 Your first week with your new phone
Types of notifications to display
Alerts for clock alarms, timers, and calendar events will automatically display through
the HTC Dot View case.
You can choose whether to display or hide Mail, Messages, and phone call
notifications.
1. In the HTC Dot View app, tap Notification settings.
2. Choose which notifications you want to show or hide.