The
Appearances, Scenes, and Decals tab on the Task Pane contains:
Dragging
When you drag an appearance, scene, or decal from the Appearances tab into the graphics area, you can apply it directly to the model. ALT-drag to open the corresponding PropertyManager or dialog box.
Double-clicking
When you double-click appearance or scene on the
Appearances tab, the items are attached to the active document.
When you double-click a decal, the Decal PropertyManager opens, but the decal is not inserted into the graphics area.