Index: trunk/MagicSoft/Mars/mimage/MHillasCalc.cc
===================================================================
--- trunk/MagicSoft/Mars/mimage/MHillasCalc.cc	(revision 2027)
+++ trunk/MagicSoft/Mars/mimage/MHillasCalc.cc	(revision 2028)
@@ -30,9 +30,26 @@
 //  This is a task to calculate the Hillas parameters from each event
 //
+//  By default MHillas, MHillasExt and MNewImagePar are calculated
+//  with the information from MCerPhotEvt and MGeomCam.
+//
+//  To switch of the calculation you may use:
+//   - Disable(MHillasCalc::kCalcHillas)
+//   - Disable(MHillasCalc::kCalcHillasExt)
+//   - Disable(MHillasCalc::kCalcNewImagePar)
+//
+//  If the calculation of MHillas is switched off a container MHillas
+//  in the parameter list is nevertheless necessary for the calculation
+//  of MHillasExt and MNewImagePar.
+//
+//  The names of the containers to be used can be set with:
+//   - SetNameHillas("NewName")
+//   - SetNameHillasExt("NewName")
+//   - SetNameNewImgPar("NewName")
+//
 //  Input Containers:
-//   MCerPhotEvt, MGeomCam
+//   MCerPhotEvt, MGeomCam[, MHillas]
 //
 //  Output Containers:
-//   MHillas, MHillasExt
+//   [MHillas,] MHillasExt, MNewImagePar
 //
 /////////////////////////////////////////////////////////////////////////////