Index: /trunk/src/org/openstreetmap/josm/gui/preferences/imagery/ImageryPreference.java
===================================================================
--- /trunk/src/org/openstreetmap/josm/gui/preferences/imagery/ImageryPreference.java	(revision 13424)
+++ /trunk/src/org/openstreetmap/josm/gui/preferences/imagery/ImageryPreference.java	(revision 13425)
@@ -580,5 +580,5 @@
             ActivateAction() {
                 putValue(NAME, tr("Activate"));
-                putValue(SHORT_DESCRIPTION, tr("copy selected defaults"));
+                putValue(SHORT_DESCRIPTION, tr("Copy selected default entries from the list above into the list below."));
                 new ImageProvider("preferences", "activate-down").getResource().attachImageIcon(this, true);
             }