Dell Venue 7 (3741, Late 2014) - Manual (Page 11)

Getting Started | 11
Locking and unlocking your device
Press the power button to turn off the screen and lock your device.
You can also configure your device to automatically lock after a certain period of
inactivity.
Tap
→ Settings → Display → Sleep to set the time after which you want the
device to enter sleep state and lock itself.
To unlock the screen, press the power button and then slide the lock icon
in any
direction.
NOTE : The procedure to unlock your device varies depending on the security
method you choose .
Touch tips
Your device supports multi-touch. You can use the touch screen as follows:
Tap Touch the screen once to access a menu or select an item.
Tap and hold Touch and hold your finger in place.
Slide Switch between different home screens.
Drag Tap and hold an icon and then move the icon to the target position.
Two-finger
zoom Place two fingers on the screen and move the fingers apart to
zoom-in or bring the fingers close to zoom out. You can use
zoom-in and zoom-out in maps, photos, web pages, and so on.