diff --git a/runtime/Java/src/org/antlr/v4/runtime/tree/gui/TreeViewer.java b/runtime/Java/src/org/antlr/v4/runtime/tree/gui/TreeViewer.java
index a31dd8674..a77a6eb83 100644
--- a/runtime/Java/src/org/antlr/v4/runtime/tree/gui/TreeViewer.java
+++ b/runtime/Java/src/org/antlr/v4/runtime/tree/gui/TreeViewer.java
@@ -273,7 +273,7 @@ public class TreeViewer extends JComponent {
 
 	public void open() {
 		final TreeViewer viewer = this;
-		viewer.setScale(2.0);
+		viewer.setScale(1.5);
 		javax.swing.SwingUtilities.invokeLater(new Runnable() {
             public void run() {
 				showInDialog(viewer);