diff --git a/libm65/mapsim.f90 b/libm65/mapsim.f90
index 0ef239484..f71d6070a 100644
--- a/libm65/mapsim.f90
+++ b/libm65/mapsim.f90
@@ -15,6 +15,10 @@ program mapsim
   if(nargs.ne.9) then
      print*,'Usage: mapsim level "message"    mode f1 f2 nsigs pol SNR nfiles'
      print*,'Example:        25 "CQ K1ABC FN42" B -22 33  20    45 -20    1'
+     print*,' '
+     print*,'Enter message = "" to use entries in msgs.txt.'
+     print*,'Enter pol = -1 to generate a range of polarization angles.'
+     print*,'Enter SNR = 0 to generate a range of SNRs.'
      go to 999
   endif
 
diff --git a/mainwindow.cpp b/mainwindow.cpp
index 7af9d00d3..f610e7aa1 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -1,4 +1,4 @@
-//--------------------------------------------------------------- MainWindow
+//-------------------------------------------------------------- MainWindow
 #include "mainwindow.h"
 #include "ui_mainwindow.h"
 #include "devsetup.h"