1.1.8

src/Kniip/Editor/Annotations/HighlightAnnotation.cs

@@ -111,6 +111,16 @@ public sealed class HighlightAnnotation : Annotation
         Points[index] = new Point(point.X, Points[1 - index].Y);
     }
 
+    public override bool CanFlip => !Straight;
+
+    public override void Flip(bool horizontal)
+    {
+        for (int i = 0; i < Points.Count; i++)
+        {
+            Points[i] = Mirror(Points[i], horizontal);
+        }
+    }
+
     public override Annotation Clone()
     {
         var clone = (HighlightAnnotation)base.Clone();