BUG
When labeling features with the Maplex Labeling Engine, the '-' character does not display in the label.When the option to make this character visible is checked in the stacking options and a numeric field is labeled, the negative sign still does not display in the label.
By default, Maplex attempts to stack labels and the '-' sign is one of the characters used to determine where to break the label and stack.
In the case of negative numbers, the '-' sign is interpreted as a stacking character and not displayed in the label.
Article ID:000008618
Get help from ArcGIS experts
Download the Esri Support App