26c6c410e0e0.Use 16:9 as a practical working canvas
The Builder exports 1920×1080 and 2560×1440 because both are predictable widescreen targets. A source at least 2000 pixels wide provides enough detail for common desktop windows. Very tall images can work, but Fill will crop aggressively and Fit may expose background tint at the sides.
Composition matters more than raw resolution
Keep the left side and lower center quieter because navigation and the composer often occupy those areas. Move a strong face, logo-like mark, or bright light away from text. Zoom and position should create useful negative space rather than merely preserve every source-image edge.
Choose WebP or PNG intentionally
WebP at high quality is the default for photographic or gradient artwork and usually saves substantial bytes. PNG is useful for crisp flat art, grids, or assets that must remain lossless. Avoid converting a small, already-compressed JPEG to a huge PNG; it increases size without restoring detail.
Completion checklist
- Source is at least 2000 px wide
- 16:9 crop is intentional
- Composer area stays calm
- Export format matches artwork