--- /dev/null
+.onlineHelp EOS mrcImageNormalizedSubstraction "Introduction to mrcImageNormalizedSubstraction"
+.
+.section 1 "Introduction to mrcImageNormalizedSubstraction"
+.
+.\" This is the help page associated with the Help button on
+.\" the toplevel window of mrcImageNormalizedSubstraction
+If you are reading this text,
+you should report it as a bug :-)