1. Let's take a look at the set screen lock signature effect, and the screen lock signature text will be displayed below the screen lock interface time.

2. We found the "Settings" icon on the screen of Xiaomi 9 mobile phone.

3. Then click the menu item "Lock screen, password, fingerprint" on the opened Xiaomi 9 setup page.

4. On the screen lock password and fingerprint page that opens, click the setting item of "Advanced screen lock settings".

5. Then click the menu item "Lock Screen Signature" in the opened page.