You can choose to group the DataView based on AssignedTo or ParentAsset property values. Click the drop-down arrow to display the menu items that allow you to choose the type of grouping to apply. Clicking the Group option button without clicking the drop-down will reset the view to its original flat list.
You can also choose to filter the Group items by specifying a value in the Filter edit box. (i.e. specifying the value of "CEE" as the filter expression would filter the DataView groups such that only AssignedTo Group items that contain the text "CEE" would be visible in the view)