- Enable the Maplex Label Engine.
- Click the Label Manager button on the Labeling toolbar.
- Check the check box next to the layer you want to label.
- Choose a label class under the layer.
- Click the Properties button.
- Click the Fitting Strategy tab.
- Check Stack label.
- The Maplex Label Engine stacks the labels on the default characters (spaces and commas).
- When the Street Placement placement style is selected, the Options button is not available. The Maplex Label Engine uses special stacking rules for streets.
The dialog boxes for point, line, and polygon layers differ, but the steps for enabling stacking are the same.