Change theme and decorations
Open your account menu, select Settings, and open Appearance.
Choose a theme
Section titled “Choose a theme”- Light keeps Rectangle in light mode.
- Dark uses the dark color theme.
- System follows the light or dark preference reported by this browser and operating system.
Choose decoration density
Section titled “Choose decoration density”- Full shows the complete geometric atmosphere on supported backgrounds and empty states.
- Subtle reduces that decoration.
- Off removes the optional decorative geometry.
Both choices take effect immediately. They are saved in this browser, not to the account, so another browser or device can use a different appearance.