diff --git a/Fltk/helpWindow.cpp b/Fltk/helpWindow.cpp
index 911ba489a4fc6aa1c97a78d738da7a9b6ee74e0a..fc6a8ca3f4c8fc327e6bbde0a94811ba7bdd31ac 100644
--- a/Fltk/helpWindow.cpp
+++ b/Fltk/helpWindow.cpp
@@ -462,7 +462,8 @@ helpWindow::helpWindow()
     browser->textsize(FL_NORMAL_SIZE - 2);
     browser->type(FL_MULTI_BROWSER);
     browser->callback(browser_cb);
-    browser->tooltip("Double-click to edit value");
+    browser->tooltip("Double-click to edit value; selected lines are copied "
+                     "to the clipboard");
 
     {
       Fl_Group *g = new Fl_Group(0, height - BH - WB, width, BH);
diff --git a/Fltk/messageBrowser.h b/Fltk/messageBrowser.h
index c5c21203b66da2edda5c314a784347ef6b456577..6bad75f06c25f9955791512cca50d5577e4c7667 100644
--- a/Fltk/messageBrowser.h
+++ b/Fltk/messageBrowser.h
@@ -68,6 +68,7 @@ public:
     _browser->textfont(FL_SCREEN);
 #endif
     _browser->type(FL_MULTI_BROWSER);
+    _browser->tooltip("Selected lines are copied to the clipboard");
     _browser->end();
     end();
     resizable(_browser);