Lenovo TAB3 8 Plus - Starting to Use Your Tablet; Powering On and Off; Taking Screenshots

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Turning on/off
Connect your tablet to a power outlet using the cable and USB power adapter provided.
Fully charged Charging
Turn on: Press and hold the On/Off button until the Lenovo
logo appears.
Turn off: Press and hold the On/Off button for a few seconds,
then tap Power off.
Restart: Press and hold the On/Off button for a few seconds,
then tap Restart.
Taking screenshots
Press and hold the On/Off button and the Volume down button at the same time.
Low battery
Starting to use your tablet
You might need to charge the battery before using your tablet.
Charge the battery as shown.