Lenovo A10-70 Tablet - Manual (Page 25)

Tap Settings > PERSONAL > Security to access security settings,
which include: SCREEN SECURITY, ENCRYPTION, *SIM CARD LOCK (3G
version only), PASSWORDS, DEVICE ADMINISTRATION and CREDENTIAL
STORAGE.
SCREEN SECURITY: You can set the screen lock method, and owner
information to be displayed on the lock screen.
Screen lock: You can unlock the display in one of the following ways:
Slide, Face Unlock, Voice Unlock, Pattern, PIN, and Password. To
deactivate the screen lock, set the setting to None.
Tap Pattern, use your finger on the screen (as illustrated) to draw
an unlock pattern. Once you have set the unlock pattern, you will
then be able to toggle Make pattern visible on/off.
After you have set and activated the pattern unlock function, the
unlock keypad will be displayed whenever the display is to be
unlocked. Use your finger to trace your preset pattern on the
keypad. After the preset pattern has been correctly entered, the
screen will be unlocked.
Tap PIN to input the PIN code (minimum 4 digits) you will use to
unlock the display.
Tap Password to input the password (minimum 4 characters) you
will use to unlock the display.