diff --git a/src/main/java/org/gcube/portlets/widgets/imagepreviewerwidget/client/ImagePreviewer.java b/src/main/java/org/gcube/portlets/widgets/imagepreviewerwidget/client/ImagePreviewer.java
index 9be6ffd..6957b90 100644
--- a/src/main/java/org/gcube/portlets/widgets/imagepreviewerwidget/client/ImagePreviewer.java
+++ b/src/main/java/org/gcube/portlets/widgets/imagepreviewerwidget/client/ImagePreviewer.java
@@ -21,7 +21,7 @@ public class ImagePreviewer implements EntryPoint {
 	public void onModuleLoad() {
 
 		// decomment for testing purpose
-		//test();
+		test();
 
 	}
 
@@ -51,7 +51,7 @@ public class ImagePreviewer implements EntryPoint {
 
 			}
 		});
-		b.setText("Show images");
+		b.setText("Show preview");
 
 		RootPanel.get("image-previewer-div").add(b);
 	}
diff --git a/src/main/java/org/gcube/portlets/widgets/imagepreviewerwidget/client/ui/Carousel.ui.xml b/src/main/java/org/gcube/portlets/widgets/imagepreviewerwidget/client/ui/Carousel.ui.xml
index 31c096c..3d068ab 100644
--- a/src/main/java/org/gcube/portlets/widgets/imagepreviewerwidget/client/ui/Carousel.ui.xml
+++ b/src/main/java/org/gcube/portlets/widgets/imagepreviewerwidget/client/ui/Carousel.ui.xml
@@ -3,17 +3,22 @@
 	xmlns:g="urn:import:com.google.gwt.user.client.ui" xmlns:b="urn:import:com.github.gwtbootstrap.client.ui">
 	<ui:style>
 	.image {
-		margin: auto;
-		width: 100%;
-		display: block;
+		margin: 0;
+		position: relative;
+		top: 50%;
+		left: 50%;
+		margin-right: -50%;
+		transform: translate(-50%, -50%);
+		max-height: 400px;
+		width: auto;
 	}
 	
 	.image-loading {
 		display: block;
 		margin-left: auto;
 		margin-right: auto;
-		margin-top: 30%;
-		margin-bottom: 30%;
+		margin-top: 35%;
+		margin-bottom: 35%;
 	}
 	
 	.arrow {
@@ -34,9 +39,9 @@
 	@external .modal-body;
 	.modal-body {
 		position: relative;
-		max-height: 500px;
+		height: 400px;
 		padding: 0;
-		overflow-y: hidden;
+		overflow: hidden;
 	}
 	
 	@external .modal-footer;