The panel is the directory of your model. If you are working on a complex SketchUp model (e.g., a 10,000 sq ft office building), you cannot model without this.

A SketchUp model file (typically ending in .skp ) contains not just the geometry of a building or object, but also texture mappings, component data, scenes (views), styles, and shadows. It serves as a sandbox for ideas—a place where concepts can be sketched in 3D with the same fluidity as a pencil on paper.

If you learned SketchUp before 2020, you remember "Layers." SketchUp now uses . The conceptual difference is critical: