Labels
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A Choropleth map provides the capability to display titles within map shapes and allows you to manage what data to show in the shape tooltips.
To manage map titles and tooltips, click the Shape Labels button in the Design ribbon tab of the Choropleth Map Tools contextual tab set.
This invokes the Shape Label Settings dialog.
In this dialog, you can specify attributes whose values will be displayed within shapes and tooltips. Use the 
button to preview the available attributes and their values for the current map.
Shape Titles
The Title attribute option allows you to select the attribute whose values are displayed within corresponding map shapes.
You can also use the Include summary value option to add summary values to shape titles.
In code, use the MapDashboardItem.ShapeTitleAttributeName property to specify the required attribute. The ChoroplethMapDashboardItem.IncludeSummaryValueToShapeTitle property allows you to specify whether to include summary values in shape titles.
Tooltips
The Choropleth Map dashboard item displays a tooltip that shows information related to a hovered shape.
You can choose whether to use a binding attribute to display as the title of shape tooltips (the Use binding attribute option) or specify a custom attribute using the Tooltip attribute option.
In code, use the ChoroplethMapDashboardItem.TooltipAttributeName property.
The Choropleth Map also allows you to add supplementary content to the tooltips using the TOOLTIP DATA ITEMS area. To learn more, see the Providing Data topic.