diff --git a/screening/source/java/ch/systemsx/cisd/openbis/plugin/screening/client/web/client/application/detailviewers/PlateLocationsMaterialSection.java b/screening/source/java/ch/systemsx/cisd/openbis/plugin/screening/client/web/client/application/detailviewers/PlateLocationsMaterialSection.java
index 17c9321b3626806a72e27ea2f305f486069d0ec2..f2ee165057f55ac3c74d434821c8ea99dbe8c92f 100644
--- a/screening/source/java/ch/systemsx/cisd/openbis/plugin/screening/client/web/client/application/detailviewers/PlateLocationsMaterialSection.java
+++ b/screening/source/java/ch/systemsx/cisd/openbis/plugin/screening/client/web/client/application/detailviewers/PlateLocationsMaterialSection.java
@@ -176,7 +176,7 @@ class PlateLocationsMaterialSection extends SingleSectionPanel
     private Widget createPlateLocationPanel(List<WellContent> wellLocations, String channel)
     {
         LayoutContainer container = new LayoutContainer();
-        container.setLayout(new TableLayout(3));
+        container.setLayout(new TableLayout(2));
         TableData cellLayout = new TableData();
         cellLayout.setPadding(20);
         for (WellContent loc : wellLocations)