How to change chats background?

1) From any chat (one-on-one or group), tap the Settings icon in the upper right corner. 2) Tap on ‘Set Background’.   3) Choose from the image gallery that’s optimized as background for your chats.personalize-chat-3 4) You can also use your own photos by tapping  ’Choose Photo’, and select from an album or open camera to take a picture. Add photo for bg 5) Background only applies to the specific chat you set it for.  You can customize each chat!