The Assets panel lists all the controls, styles, media, behaviors, and effects that you can draw on the artboard. The most commonly used controls appear in the Tools panel, but the Assets panel lists all controls that are available to your Microsoft Expression Blend project.
You can open the Assets panel by clicking Assets at the bottom of the Tools panel, or by clicking Assets on the Window menu.
The Assets panel while you are working on a WPF-based application, with the Controls tab selected
Type text in the Search box to filter the list of assets.
Select to show all available controls.
Switch between the Grid mode view and the List mode view of assets.
Select to show only the styles that are contained in the Windows Presentation Foundation (WPF) Simple Styles resource dictionary.
Click a category or subcategory to view the list of assets in that category.
View a description of the selected category or subcategory.
To add a control, style, or media object to the artboard, do one of the following:
With a category or subcategory selected, click one of the items in the list, and then use your pointer to draw the object on the artboard.
With a category or subcategory selected, double-click one of the items in the list to insert a new object into the active layout panel.
With a category or subcategory selected, drag one of the items from the list onto the artboard.
To add a behavior or an effect to an object on the artboard, you can drag the behavior or effect onto the object on the artboard or in the Objects and Timeline panel.