diff --git a/MatterControlLib/PartPreviewWindow/ViewControls3D.cs b/MatterControlLib/PartPreviewWindow/ViewControls3D.cs
index 0536fbd14..94b7ad67c 100644
--- a/MatterControlLib/PartPreviewWindow/ViewControls3D.cs
+++ b/MatterControlLib/PartPreviewWindow/ViewControls3D.cs
@@ -643,12 +643,11 @@ namespace MatterHackers.MatterControl.PartPreviewWindow
 				OpenColor = openColor,
 				DrawArrow = true,
 				Margin = theme.ButtonSpacing,
-				PopupBorderColor = Color.Transparent
+				PopupBorderColor = Color.Transparent,
+				PopupHAnchor = HAnchor.Fit,
+				PopupVAnchor = VAnchor.Fit
 			};
 
-			libraryPopup.PopupHAnchor = HAnchor.Fit;
-			libraryPopup.PopupVAnchor = VAnchor.Fit;
-
 			return libraryPopup;
 		}