If you’re using VoiceOver gestures, keep a finger on the trackpad and press the Control key. When you hear the item you want, jump to it in the view browser you can interact with it.
The bottom section is a list view of the items. The top section is a graphical view of each item, such as folder icons or a preview of the first page of a document. In Cover Flow view, the browser is split horizontally into two sections. You can choose from icon, list, column, or Cover Flow view. Press VO-Right Arrow key until you hear the view you want to use.