The Screen Lock Wallpaper
You can set the display to turn off automatically after a timeout period
of inactivity, or turn it off manually by pressing the power button 
.
When you press the power button 
to wake up the display, the screen lock wallpaper appears to help prevent unintentional touch of the screen.
1
2
1Drag or flick this button downward to enable or disable the vibration mode.
2Drag or flick this button upward to unlock the screen.
NOTE: To set the duration the screen remains on before turning off after the last operation, touch the Home button 
→ Menu button 
→ Settings→ Display→ Screen timeout.
Understanding Your Dell Streak 7 Tablet
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