For added security when showing your phone to someone else, use the screen pinning option to lock the display on the current app.
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From the
Home screen, tap
.
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Under
Advanced, tap
Screen pinning, and then tap the
On/Off switch to turn it on.
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On the Apps screen, open the app that you want.
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Press , and then tap on the app thumbnail.
If you're using the card view, press and hold the thumbnail of the latest app you opened, and then drag it up a little bit to see the icon.
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When prompted, tap
Start.
If you're using a lock screen, select the
Ask for unlock pattern before unpinning option for added security.
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To unpin the screen, press and hold and at the same.