How can the text messages on Apple's mobile phone be displayed at the top of the screen?

Take the iPhone 7 mobile phone as an example, the setting method is as follows:

First, click "Settings" on the phone desktop.

Second, select the "Notification" option in the setting interface.

Third, then open "information" in the notification interface to enter.

4. After entering, turn on the switch of "lock screen display" and "banner display", and then click "display preview" to enter.

5. Check "Always" after entering.