The right button of the toolbar will open or close a popup that displays Google Street View and Virtual Earth for the current center of the map. It functions similarly to the example at the Geospatial Portal.

The following map is defined as
[map baselayers="google,ve" center="2.29526,48.87327" zoom="15" streetview="views=google+ve,width=400,height=400"/]. The streetview parameter adds the button to the toolbar and the popup.