HTC Rezound User Manual page 142

142 Photos, videos, and music
Playing music from the Lock screen
When you're listening to music and the screen turns off, press POWER/
LOCK to turn the screen back on and control the music playback directly
on the Lock screen.
If you don't see the playback controls on the Lock screen, swipe your
finger from left to right on the box onscreen.
You can also pause music playback right from the Notifications
panel.