ArcGIS Pro 3.2 API Reference Guide
ArcGIS.Core.CIM Namespace / MaplexLabelRotationType Enumeration
Example Example Version

MaplexLabelRotationType Enumeration
Maplex rotation types.
Syntax
public enum MaplexLabelRotationType : System.Enum, System.IComparable, System.IConvertible, System.IFormattable  
Members
MemberDescription
Arithmetic Arithmetic rotation.
AV3 ArcView 3 rotation.
Geographic Geographic rotation.
Radians Rotation in radians.
Example
Modify label Rotation - Point geometry
//Note: call within QueuedTask.Run()

//Get the layer's definition
var lyrDefn = featureLayer.GetDefinition() as CIMFeatureLayer;
//Get the label classes - we need the first one
var listLabelClasses = lyrDefn.LabelClasses.ToList();
var theLabelClass = listLabelClasses.FirstOrDefault();
//Modify label Rotation
CIMMaplexRotationProperties rotationProperties = new CIMMaplexRotationProperties
{
  Enable = true, //Enable rotation
  RotationField = "ELEVATION", //Field that is used to define rotation angle
  AdditionalAngle = 15, //Additional rotation 
  RotationType = MaplexLabelRotationType.Arithmetic,
  AlignmentType = MaplexRotationAlignmentType.Perpendicular,
  AlignLabelToAngle = true
};
theLabelClass.MaplexLabelPlacementProperties.RotationProperties = rotationProperties;
lyrDefn.LabelClasses = listLabelClasses.ToArray(); //Set the labelClasses back
featureLayer.SetDefinition(lyrDefn); //set the layer's definition
Inheritance Hierarchy

System.Object
   System.ValueType
      System.Enum
         ArcGIS.Core.CIM.MaplexLabelRotationType

Requirements

Target Platforms: Windows 11, Windows 10

ArcGIS Pro version: 3 or higher.
See Also