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You do not need a separate wallpaper-only mode. Start from any curated location or public submission, frame the shot you want, then save the render for desktop, mobile, or print.
As a guide, it helps people understand that wallpapers come from any fractal view, not a separate generator. It also gives you a single place to explain export presets and recommended compositions without turning Wallpapers into a separate tool.
Good curated frames when you want a fast wallpaper without hunting through the full atlas first.