ArcGIS Pro 3.4 API Reference Guide
ArcGIS.Core.CIM Namespace / CIMMaplexLabelPlacementProperties Class / GraticuleAlignmentType Property
Example Version

GraticuleAlignmentType Property
Gets or sets the options for the graticule alignment type.
Syntax
public MaplexGraticuleAlignmentType GraticuleAlignmentType {get; set;}
Example
Modify Orientation of a label using the MaplexEngine - Points and Polygon 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 Orientation                 
theLabelClass.MaplexLabelPlacementProperties.GraticuleAlignment = true;
theLabelClass.MaplexLabelPlacementProperties.GraticuleAlignmentType = MaplexGraticuleAlignmentType.Curved;

lyrDefn.LabelClasses = listLabelClasses.ToArray(); //Set the labelClasses back
featureLayer.SetDefinition(lyrDefn); //set the layer's definition
Requirements

Target Platforms: Windows 11, Windows 10

ArcGIS Pro version: 3 or higher.
See Also