Index: trunk/MagicSoft/Mars/mhbase/MHn.cc
===================================================================
--- trunk/MagicSoft/Mars/mhbase/MHn.cc	(revision 8709)
+++ trunk/MagicSoft/Mars/mhbase/MHn.cc	(revision 8719)
@@ -317,4 +317,8 @@
 }
 
+// --------------------------------------------------------------------------
+//
+// Set additional scale factors for the current histogram
+//
 void MHn::SetScale(Double_t x, Double_t y, Double_t z) const
 {
@@ -323,4 +327,9 @@
 }
 
+// --------------------------------------------------------------------------
+//
+// Enable or disable displaying log-scale for the current histogram.
+// Normally it is retrieved from the corresponding MBinning
+//
 void MHn::SetLog(Bool_t x, Bool_t y, Bool_t z) const
 {
@@ -328,4 +337,12 @@
         fHist[fNum-1]->SetLog(x, y, z);
 }
+
+// --------------------------------------------------------------------------
+//
+// Set the axis range in Finalize automatically to the histogram region
+// containing contents. This is the default for the x-axis.
+// This function can be used to enable this behaviour also for the other
+// axis, or disable it for the x-axis of the current histogram.
+//
 void MHn::SetAutoRange(Bool_t x, Bool_t y, Bool_t z) const
 {
@@ -334,4 +351,8 @@
 }
 
+// --------------------------------------------------------------------------
+//
+// Call Sumw2 for trhe current histogram, enabling errors.
+//
 void MHn::Sumw2() const
 {
@@ -340,4 +361,9 @@
 }
 
+// --------------------------------------------------------------------------
+//
+// Force the given binning(s) for the current histogram. The binnings
+// do not get owned. The user is responsible for deleting them.
+//
 void MHn::SetBinnings(MBinning *x, MBinning *y, MBinning *z) const
 {