The asset tray appears at the top of the following applications:
Merchandising
Site Administration; described in the Multisite Administration Guide.
Targeting and Segmentation; described in the Business Control Center User's Guide.
Access Control; described in the Business Control Center Administration and Development Guide.
The asset tray allows you to bookmark assets so you can more easily organize and edit them, for example with multi-edit operations. When the asset tray contains no assets, it appears as a thin bar at the top of the Navigation and Details panes.
See Tips for Dragging Assets to the Asset Tray for additional information on asset tray behavior for these windows.

When you add assets to the asset tray, it expands to display the bookmarks:
