Open Design → Background.
- Solid uses the page background color.
- Gradient: two colors and an angle.
- Image / Video: your upload, with blur, darkening and parallax.
- Effect: Particles, Aurora, Stars, Grid, Snow, Matrix, Waves, Orbs, Noise, Hex, Rain, Fireflies, Gradient flow. Each has a color and an intensity. Canvas effects pause when the tab is hidden and are skipped for visitors who prefer reduced motion.
Grid lines are the subtle Linky grid, in any color.
Overlays sit on top of everything: Snow, Confetti, Petals, Embers, Rain, Scanlines, Noise, Vignette.