Tap Settings.

Tap Notifications.

Tap Show Previews.

To select notification preview on the lock screen, tap Always.

To select notification preview only when your tablet is unlocked, tap When Unlocked.

To turn off notification preview, tap Never.

Tap arrow left.

Tap the required application.

Tap the indicator next to "Allow Notifications" to turn notifications for the selected application on or off.

Tap the Home key to return to the home screen.

Slide your finger downwards starting from the top of the screen.

Tap the required notification and follow the instructions on the screen to use the selected function.

Tap the Home key to return to the home screen.