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Label alignment value options.
| Constant | Value | Description | 
|---|---|---|
| esriMaplexRotationAlignmentStraight | 0 | Label is aligned straight with the rotation angle. | 
| esriMaplexRotationAlignmentHorizontal | 1 | Label is kept horizontal regardless of rotation angle. | 
| esriMaplexRotationAlignmentPerpendicular | 2 | Label is aligned prependicular to the rotation angle. |