diff --git a/pom.xml b/pom.xml
index 03dc1a5..550327d 100644
--- a/pom.xml
+++ b/pom.xml
@@ -31,11 +31,13 @@
 
     <build>
         <plugins>
+<!--
                <plugin>
                 <groupId>ch.elca.el4j.maven.plugins</groupId>
                 <artifactId>depgraph-maven-plugin</artifactId>
                 <version>3.1</version>
             </plugin>
+-->
         </plugins>
     </build>
     <dependencies>
diff --git a/src/main/java/org/xmlcml/euclid/Real2Range.java b/src/main/java/org/xmlcml/euclid/Real2Range.java
index 823416c..daab0f5 100644
--- a/src/main/java/org/xmlcml/euclid/Real2Range.java
+++ b/src/main/java/org/xmlcml/euclid/Real2Range.java
@@ -504,4 +504,45 @@ public boolean isLessThan(Real2Range bbox) {
 			xrange.isLessThan(bbox.getXRange()) &&
 			yrange.isLessThan(bbox.getYRange()); 
 	}
+	
+	/** extend the end of range upper end in given direction
+	 * 
+	 * uses RealRange.extendUpperEndBy
+	 * 
+	 * @param direction
+	 * @param delta
+	 */
+	public void extendUpperEndBy(Direction direction, double delta) {
+		RealRange realRange = (Direction.HORIZONTAL.equals(direction) ? xrange : yrange);
+		realRange.extendUpperEndBy(delta);
+	}
+	
+	/** extend the end of range lower end in given direction
+	 * 
+	 * uses RealRange.extendLowerEndBy
+	 * 
+	 * @param direction
+	 * @param delta
+	 */
+	public void extendLowerEndBy(Direction direction, double delta) {
+		RealRange realRange = (Direction.HORIZONTAL.equals(direction) ? xrange : yrange);
+		realRange.extendLowerEndBy(delta);
+	}
+	
+	/** extend the end of range lower end in given direction
+	 * 
+	 * uses RealRange.extendLowerEndBy
+	 * uses RealRange.extendUpperEndBy
+	 * 
+	 * @param direction
+	 * @param lowerDelta
+	 * @param upperDelta
+	 */
+	public void extendBothEndsBy(Direction direction, double lowerDelta, double upperDelta) {
+		RealRange realRange = (Direction.HORIZONTAL.equals(direction) ? xrange : yrange);
+		realRange.extendLowerEndBy(lowerDelta);
+		realRange.extendUpperEndBy(upperDelta);
+	}
+	
+	
 }