Index: src/org/openstreetmap/josm/gui/preferences/ImageryPreference.java
===================================================================
--- src/org/openstreetmap/josm/gui/preferences/ImageryPreference.java	(revision 4423)
+++ src/org/openstreetmap/josm/gui/preferences/ImageryPreference.java	(working copy)
@@ -420,7 +420,7 @@
             // Add default item map
             map = new JMapViewer();
             map.setZoomContolsVisible(false);
-            map.setPreferredSize(new Dimension(200, 200));
+            map.setMinimumSize(new Dimension(100, 200));
             add(map, GBC.std().insets(5, 5, 0, 0).fill(GridBagConstraints.BOTH).weight(0.33, 0.6).insets(5, 0, 0, 0));
 
             listdef.getSelectionModel().addListSelectionListener(new DefListSelectionListener());