Select a map layer in the Map Layers pane to display
its map style property sheet.
Click the Labeling property
and select the type of labeling you want from the list.
The labels are displayed on the map in the Map View and
a Labels layer is added to the Map Layers pane.
Set the label properties for this layer in the map style
property sheet.
The following figure shows an example of a map style
property sheet for a labels layer.
Label layer properties
To set the priority of the Labels sublayers, drag and
drop the sublayers in the Labels layer to the position in the hierarchy
that you want, remembering that the sublayer at the bottom of the
hierarchy has the greatest priority.