If the thematic Map has more than one classes with cartographic style defined then a new icon appears at the right of thematic classes tool bar. It’s called Cartographic Styles Intersections and it manages the priority of display when cartographic styles intersect. This option is not available, if only a single display scale is added or if features are not symbolized with cartographic styles.
Steps:
1) Add a couple of display scales for any one particular class. Say 0:1500, 1500: Unlimited.
2) Once these scales are added, set the Symbology Type of each to Cartographic Styles and select some style from the available drop down menu.
3) Once this is done, check the ‘Cartographic Style Intersection’ icon displayed.
4) Selecting the Cartographic Styles Intersections tools will display the dialog as below. Each scale will show up with its set cartographic style. The styles are prioritized, based on how they are defined.
The components of the Cartographic Styles are drawn in priority order from left to right. Components to the right will be drawn on top of those to the left.
In the bottom pane, each thematic class is shown as a vertical line. A preview class is shown horizontally.
The display shows what each intersection will look like when crossing the preview class.
Adjusting the priority
Each component can be moved left or right to increase or decrease the priority of display.
If two components are merged they are drawn at the same time.
If two classes have the same priority they are drawn in the order they appear in the map.
As the Cartographic Style components are moved left or right or are merged, the preview display is updated to show the effect on each class. Select different preview classes to verify how each class will look compared to the others.
When all priorities are correctly defined, select OK to save the cartographic definition.