Index: trunk/ppMerge/src/ppMergeOptions.h
===================================================================
--- trunk/ppMerge/src/ppMergeOptions.h	(revision 9341)
+++ trunk/ppMerge/src/ppMergeOptions.h	(revision 9463)
@@ -21,5 +21,5 @@
     bool zero;                          // Subtract background before combining?
     bool scale;                         // Scale by the background before combining?
-    bool exptime;                       // Normalise by the exposure time?
+    bool darktime;                      // Normalise by the dark time (time since flush)?
     bool shutter;                       // Generate shutter correction?
     unsigned int sample;                // Sampling factor for measuring the background