The Properties panel changes based on the selected item.
Catalog objects can expose size, color, opacity, texture variation, tiling, and placement options.
Walls expose thickness, height, color, wallpaper, floor texture, and room actions.
Shapes expose dimensions and shape-specific settings.
Stages, tents, curtains, and special objects can expose dedicated controls.
If the panel says no object is selected, click an object, wall, or floor in the canvas.