diff --git a/Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/compositeeditor/StructureEditorModel.java b/Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/compositeeditor/StructureEditorModel.java
index 92e6623f2a..ab9f52d06a 100644
--- a/Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/compositeeditor/StructureEditorModel.java
+++ b/Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/compositeeditor/StructureEditorModel.java
@@ -309,7 +309,7 @@ class StructureEditorModel extends CompEditorModel {
 
 	private int[] convertRowsToOrdinals(int[] rows) {
 		int[] ordinals = new int[rows.length];
-		DataTypeComponent[] definedComponents = ((Structure) viewComposite).getDefinedComponents();
+		DataTypeComponent[] definedComponents = viewComposite.getDefinedComponents();
 		for (int i = rows.length - 1; i >= 0; i--) {
 			ordinals[i] = definedComponents[rows[i]].getOrdinal();
 		}
@@ -328,7 +328,7 @@ class StructureEditorModel extends CompEditorModel {
 		if (isShowingUndefinedBytes()) {
 			return rowIndex;
 		}
-		DataTypeComponent[] definedComponents = ((Structure) viewComposite).getDefinedComponents();
+		DataTypeComponent[] definedComponents = viewComposite.getDefinedComponents();
 		return definedComponents[rowIndex].getOrdinal();
 	}
 
@@ -737,16 +737,16 @@ class StructureEditorModel extends CompEditorModel {
 		catch (InvalidDataTypeException e) {
 			return false;
 		}
-		
+
 		if (isPackingEnabled() || isAtEnd(rowIndex)) {
 			return true;
 		}
-		
+
 		int undefSize = getNumUndefinedBytesAfter(dtc);
 		if (undefSize < 0) {
 			return true;
 		}
-		
+
 		int numAvailable = dtc.getLength() + undefSize;
 		return dataType.getLength() <= numAvailable;
 	}
@@ -806,7 +806,7 @@ class StructureEditorModel extends CompEditorModel {
 		if (isPackingEnabled() || isAtEnd(currentIndex)) {
 			return Integer.MAX_VALUE;
 		}
-		
+
 		// Can only replace with what fits unless at last component or empty last line.
 		DataTypeComponent comp = getComponent(currentIndex);
 		int numComponents = getNumComponents();
@@ -820,9 +820,9 @@ class StructureEditorModel extends CompEditorModel {
 		// Otherwise, get size of component and number of Undefined bytes after it.
 		FieldRange currentRange = getSelectedRangeContaining(currentIndex);
 		boolean isOneComponent =
-				(currentRange == null) || (currentRange.getStart().getIndex().intValue() +
-					1 == currentRange.getEnd().getIndex().intValue());
-		
+			(currentRange == null) || (currentRange.getStart().getIndex().intValue() +
+				1 == currentRange.getEnd().getIndex().intValue());
+
 		if (isOneComponent) {
 			return comp.getLength() + getNumUndefinedBytesAfter(comp);
 		}
@@ -860,7 +860,7 @@ class StructureEditorModel extends CompEditorModel {
 			return viewDTM.withTransaction("Insert Component", () -> {
 				DataTypeComponent dtc;
 				if (isPackingEnabled() || !(dataType instanceof BitFieldDataType)) {
-					dtc = ((Structure) viewComposite).insert(rowIndex, dataType, length, name,
+					dtc = viewComposite.insert(rowIndex, dataType, length, name,
 						comment);
 				}
 				else {
@@ -957,7 +957,8 @@ class StructureEditorModel extends CompEditorModel {
 							struct.growStructure(length - avail);
 						}
 					}
-					return ((Structure) viewComposite).replace(componentOrdinal, dataType, length, name, comment);
+					return ((Structure) viewComposite).replace(componentOrdinal, dataType, length,
+						name, comment);
 				});
 			}
 			return dtc;
@@ -1266,8 +1267,9 @@ class StructureEditorModel extends CompEditorModel {
 				dialog.setStatusText("The name cannot match the external structure name.");
 				return false;
 			}
-			DataTypeManager originalDTM = getOriginalDataTypeManager();
-			DataType conflictingDt = originalDTM.getDataType(getOriginalCategoryPath(), name);
+
+			DataTypeManager originalDtm = getOriginalDataTypeManager();
+			DataType conflictingDt = originalDtm.getDataType(getOriginalCategoryPath(), name);
 			if (conflictingDt != null) {
 				dialog.setStatusText("A data type named \"" + name + "\" already exists.");
 				return false;
diff --git a/Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/compositeeditor/UnionEditorModel.java b/Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/compositeeditor/UnionEditorModel.java
index 2e5f886c08..70df062d1c 100644
--- a/Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/compositeeditor/UnionEditorModel.java
+++ b/Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/compositeeditor/UnionEditorModel.java
@@ -16,11 +16,14 @@
 package ghidra.app.plugin.core.compositeeditor;
 
 import java.math.BigInteger;
+import java.util.*;
 
 import javax.help.UnsupportedOperationException;
+import javax.swing.table.TableColumn;
 
 import docking.widgets.fieldpanel.support.FieldRange;
 import docking.widgets.fieldpanel.support.FieldSelection;
+import docking.widgets.table.GTableHeaderRenderer;
 
 /**
  * Data union editor model for maintaining information about the edits being
@@ -53,6 +56,9 @@ class UnionEditorModel extends CompEditorModel {
 	private static final int DATATYPE = 2;
 	private static final int FIELDNAME = 3;
 	private static final int COMMENT = 4;
+	private static final int ORDINAL = 5;
+
+	private List<TableColumn> hiddenColumns;
 
 	UnionEditorModel(UnionEditorProvider provider, boolean showInHex) {
 		super(provider);
@@ -62,6 +68,12 @@ class UnionEditorModel extends CompEditorModel {
 		adjustOffsets();
 		this.showHexNumbers = showInHex;
 
+		List<TableColumn> additionalColumns = new ArrayList<>();
+		TableColumn ordinalColumn = new TableColumn(ORDINAL, 75);
+		ordinalColumn.setHeaderRenderer(new GTableHeaderRenderer());
+		ordinalColumn.setHeaderValue("Ordinal");
+		additionalColumns.add(ordinalColumn);
+		hiddenColumns = Collections.unmodifiableList(additionalColumns);
 	}
 
 	@Override
@@ -69,6 +81,11 @@ class UnionEditorModel extends CompEditorModel {
 		return "Union";
 	}
 
+	@Override
+	protected List<TableColumn> getHiddenColumns() {
+		return hiddenColumns;
+	}
+
 	@Override
 	public int getOffsetColumn() {
 		return -1;
@@ -99,6 +116,29 @@ class UnionEditorModel extends CompEditorModel {
 		return COMMENT;
 	}
 
+	@Override
+	public Object getValueAt(int rowIndex, int columnIndex) {
+
+		if ((viewComposite == null) || (rowIndex < 0) || (columnIndex < 0)) {
+			return "";
+		}
+
+		DataTypeComponent dtc = getComponent(rowIndex);
+		if (dtc == null) {
+			if (columnIndex == getDataTypeColumn()) {
+				return null;
+			}
+			return "";
+		}
+
+		if (columnIndex == ORDINAL) {
+			int ordinal = dtc.getOrdinal();
+			return showHexNumbers ? getHexString(ordinal, true) : Integer.toString(ordinal);
+		}
+
+		return super.getValueAt(rowIndex, columnIndex);
+	}
+
 	/**
 	 *  returns whether or not a particular component row and field in this
 	 *  structure is editable.
@@ -381,7 +421,7 @@ class UnionEditorModel extends CompEditorModel {
 		checkIsAllowableDataType(dataType);
 		try {
 			DataTypeComponent dtc = viewDTM.withTransaction("Add Component",
-				() -> ((Union) viewComposite).insert(rowIndex, dataType, length, name, comment));
+				() -> viewComposite.insert(rowIndex, dataType, length, name, comment));
 			if (rowIndex <= currentEditRow) {
 				currentEditRow++;
 			}
@@ -418,8 +458,8 @@ class UnionEditorModel extends CompEditorModel {
 		try {
 			boolean isSelected = selection.containsEntirely(BigInteger.valueOf(rowIndex));
 			DataTypeComponent dtc = viewDTM.withTransaction("Replace Component", () -> {
-				((Union) viewComposite).delete(rowIndex);
-				return ((Union) viewComposite).insert(rowIndex, dataType, length, name, comment);
+				viewComposite.delete(rowIndex);
+				return viewComposite.insert(rowIndex, dataType, length, name, comment);
 			});
 			if (isSelected) {
 				selection.addRange(rowIndex, rowIndex + 1);
@@ -487,7 +527,7 @@ class UnionEditorModel extends CompEditorModel {
 
 	@Override
 	public void replaceOriginalComponents() {
-		((Union) getOriginalComposite()).replaceWith(viewComposite);
+		getOriginalComposite().replaceWith(viewComposite);
 	}
 
 	@Override