Select the annotation in the Map View, right-click, and
choose Edit Label from the pop-up menu. The Label Attribute window
appears.
The following figure shows the Label Attribute window.
The Label Attribute window
Edit the Label Attribute value and then add a Description value for the annotation. The description can be multiline, formatted
in HTML, and can take the form of a tooltip.
Click OK.
Note
To display the description when the mouse is held over
an annotation in a Map View, select Options>Show Tool Tips on the
Map.