esriLabelRotationType Constants (ArcObjects .NET 10.6 SDK)
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ArcObjects Library Reference (Carto)  

esriLabelRotationType Constants

Label rotation value options.

Constant Value Description
esriRotateLabelGeographic 0 Clockwise rotation with 0 at the positive y-axis.
esriRotateLabelArithmetic 1 Counter clockwise rotation with 0 at the positive x-axis.
esriRotateLabelRadians 2 Values are given in radians.
esriRotateLabelAV3 3 Values are given in AV3 counter clockwise rotation with 0 at the positive y-axis.

Product Availability

Available with ArcGIS Engine, ArcGIS Desktop, and ArcGIS Server.