diff --git a/src/main/java/org/gcube/portlets/user/td/mainboxwidget/client/grid/GridHeaderColumnMenu.java b/src/main/java/org/gcube/portlets/user/td/mainboxwidget/client/grid/GridHeaderColumnMenu.java
index a66382b..4f1eeb0 100644
--- a/src/main/java/org/gcube/portlets/user/td/mainboxwidget/client/grid/GridHeaderColumnMenu.java
+++ b/src/main/java/org/gcube/portlets/user/td/mainboxwidget/client/grid/GridHeaderColumnMenu.java
@@ -74,7 +74,6 @@ public class GridHeaderColumnMenu {
 		replaceValueBatchItem.setIcon(MainboxResources.INSTANCE.columnReplaceBatch());	
 		menuItems.add(replaceValueBatchItem);
 		
-
 		MenuItem replaceValueOnConditionItem = new MenuItem("Replace By Expression");
 		replaceValueOnConditionItem.setId(GridHeaderOperationId.COLUMNREPLACEBYEXPRESSION.toString());
 		replaceValueOnConditionItem.setIcon(MainboxResources.INSTANCE.columnReplaceByExpression());	
@@ -85,6 +84,12 @@ public class GridHeaderColumnMenu {
 		replaceValueByExternalItem.setIcon(MainboxResources.INSTANCE.columnReplaceByExternal());	
 		menuItems.add(replaceValueByExternalItem);
 		
+		MenuItem downscaleCSquareItem = new MenuItem("Downscale C-Square");
+		downscaleCSquareItem.setId(GridHeaderOperationId.DOWNSCALECSQUARE.toString());
+		downscaleCSquareItem.setIcon(MainboxResources.INSTANCE.downscaleCSquare());	
+		menuItems.add(replaceValueByExternalItem);
+		
+		
 		
 		/*MenuItem newAnnotationColumnItem = new MenuItem("Annotation");
 		newAnnotationColumnItem.setId(GridHeaderOperationId.ANNOTATIONADD.toString());
diff --git a/src/main/java/org/gcube/portlets/user/td/mainboxwidget/client/resources/MainboxResources.java b/src/main/java/org/gcube/portlets/user/td/mainboxwidget/client/resources/MainboxResources.java
index 77c22bc..631b9eb 100644
--- a/src/main/java/org/gcube/portlets/user/td/mainboxwidget/client/resources/MainboxResources.java
+++ b/src/main/java/org/gcube/portlets/user/td/mainboxwidget/client/resources/MainboxResources.java
@@ -121,7 +121,11 @@ public interface MainboxResources extends ClientBundle {
 	@Source("table-replace-by-external-col.png")
 	ImageResource columnReplaceByExternal();
 
-	
+	@Source("downscale-csquare_32.png")
+	ImageResource downscaleCSquare32();
+
+	@Source("downscale-csquare.png")
+	ImageResource downscaleCSquare();
 	
 	
 }
diff --git a/src/main/java/org/gcube/portlets/user/td/mainboxwidget/client/resources/downscale-csquare.png b/src/main/java/org/gcube/portlets/user/td/mainboxwidget/client/resources/downscale-csquare.png
new file mode 100644
index 0000000..63d1810
Binary files /dev/null and b/src/main/java/org/gcube/portlets/user/td/mainboxwidget/client/resources/downscale-csquare.png differ
diff --git a/src/main/java/org/gcube/portlets/user/td/mainboxwidget/client/resources/downscale-csquare_32.png b/src/main/java/org/gcube/portlets/user/td/mainboxwidget/client/resources/downscale-csquare_32.png
new file mode 100644
index 0000000..2ed95ae
Binary files /dev/null and b/src/main/java/org/gcube/portlets/user/td/mainboxwidget/client/resources/downscale-csquare_32.png differ
diff --git a/src/main/resources/org/gcube/portlets/user/td/mainboxwidget/client/resources/downscale-csquare.png b/src/main/resources/org/gcube/portlets/user/td/mainboxwidget/client/resources/downscale-csquare.png
new file mode 100644
index 0000000..63d1810
Binary files /dev/null and b/src/main/resources/org/gcube/portlets/user/td/mainboxwidget/client/resources/downscale-csquare.png differ
diff --git a/src/main/resources/org/gcube/portlets/user/td/mainboxwidget/client/resources/downscale-csquare_32.png b/src/main/resources/org/gcube/portlets/user/td/mainboxwidget/client/resources/downscale-csquare_32.png
new file mode 100644
index 0000000..2ed95ae
Binary files /dev/null and b/src/main/resources/org/gcube/portlets/user/td/mainboxwidget/client/resources/downscale-csquare_32.png differ