Index: /trunk/Mars/hawc/plot_callisto.C
===================================================================
--- /trunk/Mars/hawc/plot_callisto.C	(revision 19842)
+++ /trunk/Mars/hawc/plot_callisto.C	(revision 19843)
@@ -9,4 +9,5 @@
     while (1)
     {
+        // While reading the input process gui events asynchronously
         timer.TurnOn();
         const char *gl = Getline("Type 'q' to exit, or event number and <return> to go on: ");