1. First, we click "Settings" on the desktop, and then find "Security and Privacy" in the list of settings pages, as shown below.

2. In the security and privacy interface, we can see "lock screen style" and "lock screen signature" by clicking "lock screen and password".

3. Of course, it needs to be set separately. Let's take the lock screen style as an example. After clicking enter, we can see all the styles in the current mobile phone. These styles are generated by the previously set theme. Only after changing the new theme will there be a new style, otherwise only the previous theme style will be displayed;

4. Set the lock screen signature, click "Lock screen signature", and an input window will pop up at the bottom of the page. We can enter the previous input we want to modify, and then click Save.