L1rail expands
L2one pane
L3live site stays primary

Sites

Saved sessions, six launch routes, import, featured blueprints, and the full gallery share this one launcher.

Unsaved PlaygroundNot saved
Balanced 72/28click a ratio or focus a surface
Booting Playground

Preparing WordPress

The live iframe keeps its place while the selected route starts.

Saved

Playground saved locally.