For each point layer you can choose to label the points with data from your attribute fields under the "label" tab and edit how the labels are displayed.

Note: In the JavaScript-Viewer the settings to the text background color won't be honorated. In contrast to the Flex client the starting point for the labeling is on the lower left point of the label text. Therefore, the thumbnail differs minimally to object labeling compared to the view in the Java Script Viewer. In Flex client the center of the label is used as the base point. Preview and actual map are identical.

The number of features to be labeled is limited to 150 due to performance issues regarding the browser. If there are more point features within the map extent they won't be labeled.