You can move a view-specific import symbol between the foreground and the background of a view, with respect to model elements in the view. If the import symbol is in the foregound of the view, it is in front of model elements, such as walls. It is still behind detail components and annotations.
Alternatively, select Background or Foreground from the Options Bar.
You can also use the sort order for detail components to move an import symbol in front of or behind detail components.