A private setting only you see
Chat wallpaper is a personal display setting stored on your own device. Changing it never affects what the other person sees on their end, and they aren't notified when you change it.
Different from changing the app's overall theme
Wallpaper only changes the background image behind the message bubbles in a specific chat. Switching the app's overall light or dark appearance is a separate setting, covered in its own guide.
Frequently Asked Questions
Does changing my wallpaper change it for the other person too?
No β wallpaper is a local, personal setting. The person you're chatting with keeps whatever wallpaper they've set on their own device, regardless of what you choose.
Can I set a different wallpaper for each chat?
Yes β you can set a unique wallpaper per conversation, or set one wallpaper as the default that applies to every chat that doesn't have its own custom wallpaper.