- Ensure that you have the Maplex Label Engine enabled and that you have enabled label stacking.
- 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 the Stack label check box.
- Click Options.
- Enter a Maximum number of lines value.
- Enter a Minimum number of characters per line value.
- Enter a Maximum number of characters per line value.
- Click OK to close all dialog boxes.
Maximum number of lines specifies the maximum number of lines, from 1 to 50, into which a label can be split.
Minimum number of characters per line specifies the minimum number of characters, from 1 to 8, that must be in the shortest part of a stacked label.
Maximum number of characters per line specifies the maximum number of characters, from 2 to 80, that can be on a given line of a label.