Overview
- The feature is available to some users now on macOS, with broader availability expected in the coming weeks.
- Users can pick from 22 preset themes or select from 38 colors with adjustable background brightness.
- Themes automatically adjust message bubble and background colors and support custom image wallpapers for consistent visuals.
- Personalization can be applied globally or set per conversation via each chat’s info screen.
- Controls appear under Settings > Chats, and choices do not sync with iPhone, enabling different setups on each device.