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Identifies the options for horizontal alignment in a Maplex key numbering group.
| Constant | Value | Description | 
|---|---|---|
| esriMaplexKeyNumberHorizontalAlignmentAuto | 0 | Key numbering group is automatically aligned. | 
| esriMaplexKeyNumberHorizontalAlignmentLeft | 1 | Key numbering group is left aligned. | 
| esriMaplexKeyNumberHorizontalAlignmentRight | 2 | Key numbering group is right aligned. |