diff --git a/CADability/Projection.cs b/CADability/Projection.cs
index 5997b42..601c839 100644
--- a/CADability/Projection.cs
+++ b/CADability/Projection.cs
@@ -706,6 +706,7 @@ public void SetPlacement(double factor, double dx, double dy)
             placementFactor = factor;
             placementX = dx;
             placementY = dy;
+            SetCoefficients();
         }
         /// <summary>
         /// Liefert die Werte für die Platzierung. Achtung: die Y-Werte müssen mit dem negativen