Why does a short message display the desktop?

One plus mobile phone SMS display desktop is an auxiliary function of one plus mobile phone, which can be turned off.

1. First find the application settings icon on the mobile phone desktop, and click to enter the new operation interface.

2. After entering the setting operation interface, find the lock screen and security options, and click Open.

3. After entering the screen lock and safe operation interface, find the notification option and click the switch button at the back to turn on or off the screen lock notification.