diff --git a/CHANGES.txt b/CHANGES.txt
index 382468e90..671184693 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -6,18 +6,23 @@ Major Changes:
 - Support for QA on data loads into Freebase.
 
 Features:
-- New commands: Transpose Cells in Columns into Rows
-- New GEL functions: smartSplit
-- New GEL controls: forEachIndex, forRange, filter
-- New GEL parameters:
-  - preserveAllTokens on split function
-- New exporters: to RDF (as extension)
-- In CSV and TSV importers, added support for ignoring quotation marks
-- Regexp groups capturing GEL function
+- New commands:
+  - Fill Down
+  - Blank Down
+  - Transpose Cells in Columns into Rows
+- GEL:
+  - New functions: smartSplit
+  - New controls: forEachIndex, forRange, filter
+  - New parameters:
+    - preserveAllTokens on split function
+  - Regexp groups capturing GEL function
+- Importers
+  - New: RDF exporter (as extension)
+  - CSV and TSV importers: added support for ignoring quotation marks
+  - Added support for creating a project by pointing to a data file URL.
 - Text facet's choice count limit is now configurable through preference page
 - Select All and Unselect All buttons in History Extract dialog
 - Schema skeleton: support for multiple cells per cell-as nodes, and for conditional links
-- Added support for creating a project by pointing to a data file URL.
 
 Fixes:
 - TSV/CSV exporter bug: Gridworks crashed when there were empty cells.
diff --git a/main/src/com/google/gridworks/GridworksServlet.java b/main/src/com/google/gridworks/GridworksServlet.java
index 80a903d2f..17c7723b3 100644
--- a/main/src/com/google/gridworks/GridworksServlet.java
+++ b/main/src/com/google/gridworks/GridworksServlet.java
@@ -71,6 +71,8 @@ public class GridworksServlet extends Butterfly {
         {"mass-edit", "com.google.gridworks.commands.cell.MassEditCommand"},
         {"join-multi-value-cells", "com.google.gridworks.commands.cell.JoinMultiValueCellsCommand"},
         {"split-multi-value-cells", "com.google.gridworks.commands.cell.SplitMultiValueCellsCommand"},
+        {"fill-down", "com.google.gridworks.commands.cell.FillDownCommand"},
+        {"blank-down", "com.google.gridworks.commands.cell.BlankDownCommand"},
         {"transpose-columns-into-rows", "com.google.gridworks.commands.cell.TransposeColumnsIntoRowsCommand"},
 
         {"add-column", "com.google.gridworks.commands.column.AddColumnCommand"},
diff --git a/main/src/com/google/gridworks/commands/cell/BlankDownCommand.java b/main/src/com/google/gridworks/commands/cell/BlankDownCommand.java
new file mode 100644
index 000000000..84dc14ad1
--- /dev/null
+++ b/main/src/com/google/gridworks/commands/cell/BlankDownCommand.java
@@ -0,0 +1,24 @@
+package com.google.gridworks.commands.cell;
+
+import javax.servlet.http.HttpServletRequest;
+
+import org.json.JSONObject;
+
+import com.google.gridworks.commands.EngineDependentCommand;
+import com.google.gridworks.model.AbstractOperation;
+import com.google.gridworks.model.Project;
+import com.google.gridworks.operations.cell.BlankDownOperation;
+
+public class BlankDownCommand extends EngineDependentCommand {
+    @Override
+    protected AbstractOperation createOperation(Project project,
+            HttpServletRequest request, JSONObject engineConfig) throws Exception {
+        
+        String columnName = request.getParameter("columnName");
+        
+        return new BlankDownOperation(
+            engineConfig, 
+            columnName
+        );
+    }
+}
diff --git a/main/src/com/google/gridworks/commands/cell/FillDownCommand.java b/main/src/com/google/gridworks/commands/cell/FillDownCommand.java
new file mode 100644
index 000000000..e0fd72995
--- /dev/null
+++ b/main/src/com/google/gridworks/commands/cell/FillDownCommand.java
@@ -0,0 +1,24 @@
+package com.google.gridworks.commands.cell;
+
+import javax.servlet.http.HttpServletRequest;
+
+import org.json.JSONObject;
+
+import com.google.gridworks.commands.EngineDependentCommand;
+import com.google.gridworks.model.AbstractOperation;
+import com.google.gridworks.model.Project;
+import com.google.gridworks.operations.cell.FillDownOperation;
+
+public class FillDownCommand extends EngineDependentCommand {
+    @Override
+    protected AbstractOperation createOperation(Project project,
+            HttpServletRequest request, JSONObject engineConfig) throws Exception {
+        
+        String columnName = request.getParameter("columnName");
+        
+        return new FillDownOperation(
+            engineConfig, 
+            columnName
+        );
+    }
+}
diff --git a/main/src/com/google/gridworks/operations/OperationRegistry.java b/main/src/com/google/gridworks/operations/OperationRegistry.java
index 86f49492e..0fe9cfed2 100644
--- a/main/src/com/google/gridworks/operations/OperationRegistry.java
+++ b/main/src/com/google/gridworks/operations/OperationRegistry.java
@@ -8,6 +8,7 @@ import org.json.JSONObject;
 
 import com.google.gridworks.model.AbstractOperation;
 import com.google.gridworks.model.Project;
+import com.google.gridworks.operations.cell.FillDownOperation;
 import com.google.gridworks.operations.cell.MassEditOperation;
 import com.google.gridworks.operations.cell.MultiValuedCellJoinOperation;
 import com.google.gridworks.operations.cell.MultiValuedCellSplitOperation;
@@ -50,6 +51,7 @@ public abstract class OperationRegistry {
         
         register("multivalued-cell-join", MultiValuedCellJoinOperation.class);
         register("multivalued-cell-split", MultiValuedCellSplitOperation.class);
+        register("fill-down", FillDownOperation.class);
         register("transpose-columns-into-rows", TransposeColumnsIntoRowsOperation.class);
         
         register("column-addition", ColumnAdditionOperation.class);
diff --git a/main/webapp/modules/core/scripts/views/data-table/data-table-column-header-ui.js b/main/webapp/modules/core/scripts/views/data-table/data-table-column-header-ui.js
index a8c177cb1..9e1231440 100644
--- a/main/webapp/modules/core/scripts/views/data-table/data-table-column-header-ui.js
+++ b/main/webapp/modules/core/scripts/views/data-table/data-table-column-header-ui.js
@@ -279,6 +279,15 @@ DataTableColumnHeaderUI.prototype._createMenuForColumnHeader = function(elmt) {
                     ]
                 },
                 {},
+                {
+                    label: "Fill Down",
+                    click: function() { self._doFillDown(); }
+                },
+                {
+                    label: "Blank Down",
+                    click: function() { self._doBlankDown(); }
+                },
+                {},
                 {
                     label: "Split Multi-Valued Cells ...",
                     click: function() { self._doSplitMultiValueCells(); }
@@ -925,6 +934,28 @@ DataTableColumnHeaderUI.prototype._doRenameColumn = function() {
     }
 };
 
+DataTableColumnHeaderUI.prototype._doFillDown = function() {
+    Gridworks.postProcess(
+        "fill-down", 
+        {
+            columnName: this._column.name
+        },
+        null,
+        { modelsChanged: true }
+    );
+};
+
+DataTableColumnHeaderUI.prototype._doBlankDown = function() {
+    Gridworks.postProcess(
+        "blank-down", 
+        {
+            columnName: this._column.name
+        },
+        null,
+        { modelsChanged: true }
+    );
+};
+
 DataTableColumnHeaderUI.prototype._doJoinMultiValueCells = function() {
     var separator = window.prompt("Enter separator to use between values", ", ");
     if (separator !== null) {