2. You can see the "General" option in the setting interface, and then click this option.
3. You can see the "Chat Background" option in the common interface. Click here to change the chat background.
4. Later, we will see that there are three ways to modify the chat interface. The first is to use the background of the system as the chat background, and the latter two are to use photos as the background. The setting method is similar. Follow the first method and click "Select Background Image".
5. Then, you can see that there are several systems with their own backgrounds. Click on one of them at will, and then click "Done" in the upper right corner. So the chat background is set up.