ArcGIS Pro 3.4 API Reference Guide
ArcGIS.Desktop.Editing Namespace / AnnotationProperties Class / FlipAngle Property
Version

FlipAngle Property (AnnotationProperties)
Specifies the angle, in degrees from the vertical, at which point rotated text is flipped, or mirrored, in place. At this point the text starting point becomes the ending point and conversly.
Syntax
public Nullable<double> FlipAngle {get; set;}
Requirements

Target Platforms: Windows 11, Windows 10

ArcGIS Pro version: 3 or higher.
See Also