HTC One M9 User Manual page 309

alert you of missed calls, new messages, calendar events, alarms, and other
notifications.
When the screen is on, press VOLUME to manage Do not disturb mode
quickly. When Priority is selected, tap More settings to set priority
notifications such as events and reminders or calls and messages.
If Do not disturb is on, the notification LED will not flash.
Allowing prioritized notifications to bypass Do not disturb mode
Add important contacts to an exceptions list so that you can still receive their calls even
when Do not disturb mode is on.
1. From the Home screen, tap
2. Tap Do not disturb.
3. Tap Do not disturb mode, and then select Priority.
4. Select a specific length of time for Do not disturb mode to last, or select Until
turned off to end the mode when your phone is turned off, and then tap OK.
5. Tap the priority notifications On/Off switch next to the items you wish to
bypass Do not disturb mode.
6. Tap Messages from or Calls from to select who can contact you while in Do
not disturb mode.
> Settings > Sound & notification.
Settings and security 309