Index: /trunk/MagicSoft/Mars/meventdisp/MGFadcDisp.h
===================================================================
--- /trunk/MagicSoft/Mars/meventdisp/MGFadcDisp.h	(revision 956)
+++ /trunk/MagicSoft/Mars/meventdisp/MGFadcDisp.h	(revision 957)
@@ -10,12 +10,12 @@
 #endif
 
-class MParList; 
-class MReadTree; 
-class MRawEvtData; 
+class MParList;
+class MReadTree;
+class MRawEvtData;
 
 class TList;
-class TCanvas; 
-class TGListBox; 
-class TGTextEntry; 
+class TCanvas;
+class TGListBox;
+class TGTextEntry;
 
 class MGFadcDisp : public TGTransientFrame
Index: /trunk/MagicSoft/Mars/mhist/MHHillas.cc
===================================================================
--- /trunk/MagicSoft/Mars/mhist/MHHillas.cc	(revision 956)
+++ /trunk/MagicSoft/Mars/mhist/MHHillas.cc	(revision 957)
@@ -141,17 +141,13 @@
 
     c->cd(1);
-    //fAlpha->SetBit(kCanDelete);
     fAlpha->Draw();
 
     c->cd(2);
-    //fLength->SetBit(kCanDelete);
     fLength->Draw();
 
     c->cd(3);
-    //fDist->SetBit(kCanDelete);
     fDist->Draw();
 
     c->cd(4);
-    //fWidth->SetBit(kCanDelete);
     fWidth->Draw();
 
Index: /trunk/MagicSoft/Mars/mhist/MHMcCollectionArea.cc
===================================================================
--- /trunk/MagicSoft/Mars/mhist/MHMcCollectionArea.cc	(revision 956)
+++ /trunk/MagicSoft/Mars/mhist/MHMcCollectionArea.cc	(revision 957)
@@ -31,10 +31,13 @@
 ClassImp(MHMcCollectionArea);
 
+// --------------------------------------------------------------------------
+//
+//  Creates the three necessary histograms:
+//   - selected showers (input)
+//   - all showers (input)
+//   - collection area (result)
+//
 MHMcCollectionArea::MHMcCollectionArea(const char *name, const char *title)
 { 
-    //
-    //   default constructor
-    //
-
     //   initialize the histogram for the distribution r vs E
     //
@@ -72,4 +75,8 @@
 }
 
+// --------------------------------------------------------------------------
+//
+// Delete the three histograms
+//
 MHMcCollectionArea::~MHMcCollectionArea()
 {
@@ -79,4 +86,8 @@
 }
 
+// --------------------------------------------------------------------------
+//
+// Fill data into the histogram which contains all showers
+//
 void MHMcCollectionArea::FillAll(Float_t log10E, Float_t radius)
 {
@@ -84,4 +95,8 @@
 }
 
+// --------------------------------------------------------------------------
+//
+// Fill data into the histogram which contains the selected showers
+//
 void MHMcCollectionArea::FillSel(Float_t log10E, Float_t radius)
 {
@@ -89,8 +104,26 @@
 }
 
+// --------------------------------------------------------------------------
+//
+// Draw the histogram with all showers
+//
 void MHMcCollectionArea::DrawAll(Option_t* option)
 {
     TCanvas *c=new TCanvas(fHistAll->GetName(), fHistAll->GetTitle());
 
+    fHistAll->Draw(option);
+
+    c->Modified();
+    c->Update();
+}
+
+// --------------------------------------------------------------------------
+//
+// Draw the histogram with the selected showers only.
+//
+void MHMcCollectionArea::DrawSel(Option_t* option)
+{
+    TCanvas *c=new TCanvas(fHistSel->GetName(), fHistSel->GetTitle());
+
     fHistSel->Draw(option);
 
@@ -99,14 +132,10 @@
 }
 
-void MHMcCollectionArea::DrawSel(Option_t* option)
-{
-    TCanvas *c=new TCanvas(fHistSel->GetName(), fHistSel->GetTitle());
-
-    fHistSel->Draw(option);
-
-    c->Modified();
-    c->Update();
-}
-
+// --------------------------------------------------------------------------
+//
+// Creates a new canvas and draws the histogram into it.
+// Be careful: The histogram belongs to this object and won't get deleted
+// together with the canvas.
+//
 TObject *MHMcCollectionArea::DrawClone(Option_t* option)
 {
@@ -136,4 +165,8 @@
 }
 
+// --------------------------------------------------------------------------
+//
+//  Calculate the Efficiency (collection area)
+//
 void MHMcCollectionArea::CalcEfficiency()
 {