HTC One M8 for Windows - Manual (Page 43)

2. Tap to view the volume control panel.
3. Try one of the following:
§ Drag the volume sliders to set the volume.
§ Tap the icons to the left of the volume sliders to mute or
unmute.
§ Tap to toggle the vibration on or off.
Sleep mode
Sleep mode saves battery power by putting your phone into a low power
state while the display is off. It also stops accidental button presses when
your phone is in your bag or pocket. You’ll still receive messages and calls
though.
Switching to Sleep mode
Briefly press the POWER button to turn off the display and switch to Sleep
mode. Your phone also automatically goes into Sleep mode when it’s idle
for a while.
Waking up from Sleep mode
To wake your phone up manually, press the POWER button. You’ll need to
unlock the screen.
Your first week with your new phone 43