Index: trunk/FACT++/src/ftmctrl.cc
===================================================================
--- trunk/FACT++/src/ftmctrl.cc	(revision 14210)
+++ trunk/FACT++/src/ftmctrl.cc	(revision 14211)
@@ -2074,5 +2074,6 @@
         T::AddEvent("SET_PRESCALING", "I:1", FTM::State::kIdle)
             (bind(&StateMachineFTM::SetPrescaling, this, placeholders::_1))
-            ("");
+            ("Sets the FTU readout time intervals"
+             "|time[0.5s]:The interval is given in units of 0.5s, i.e. 1 means 0.5s, 2 means 1s, ...");
 
         T::AddEvent("ENABLE_FTU", "I:1;B:1", FTM::State::kIdle)