Index: trunk/MagicSoft/Mars/mhist/MHCamEvent.cc
===================================================================
--- trunk/MagicSoft/Mars/mhist/MHCamEvent.cc	(revision 5676)
+++ trunk/MagicSoft/Mars/mhist/MHCamEvent.cc	(revision 5701)
@@ -176,4 +176,6 @@
         fSum->SetBit(MHCamera::kVariance);
 
+    fSum->SetXTitle("Pixel Idx");
+
     return kTRUE;
 }