diff --git a/src/zm.cpp b/src/zm.cpp
index 95eab3b18..d2bf75931 100644
--- a/src/zm.cpp
+++ b/src/zm.cpp
@@ -1766,7 +1766,7 @@ bool Monitor::Analyse()
 			}
 		}
 	}
-	ref_image.Blend( *image, 10 );
+	ref_image.Blend( *image, BLEND_PERC );
 	DumpImage( image );
 
 	shared_images->last_read_index = index%IMAGE_BUFFER_COUNT;
diff --git a/src/zm.h b/src/zm.h
index 112a4828c..e446d7012 100644
--- a/src/zm.h
+++ b/src/zm.h
@@ -524,6 +524,7 @@ public:
 class Monitor : public Camera
 {
 protected:
+#if 0
 	typedef enum
 	{
 		WARMUP_COUNT=25,
@@ -532,6 +533,7 @@ protected:
 		IMAGE_BUFFER_COUNT=100,
 		FPS_REPORT_INTERVAL=200,
 	};
+#endif
 	typedef enum
 	{
 		NONE=1,
diff --git a/src/zmcfg.h.z b/src/zmcfg.h.z
index 4c0704d62..e0912106a 100644
--- a/src/zmcfg.h.z
+++ b/src/zmcfg.h.z
@@ -19,10 +19,16 @@
 
 #include "config.h"
 
-#define ZM_DATABASE	"zm"
-#define	ZM_DB_USERA	"zmadmin"
-#define	ZM_DB_PASSA	"zmadminzm"
-#define	ZM_DB_USERB	"zmuser"
-#define	ZM_DB_PASSB	"zmuserzm"
+#define ZM_DATABASE			"zm"		// Database name
+#define	ZM_DB_USERA			"zmadmin"	// Privileged DB user name, needs at least select, insert, delete privileges
+#define	ZM_DB_PASSA			"zmadminzm"	// Privileged DB user password
+#define	ZM_DB_USERB			"zmuser"	// Unprivileged DB user name, need just select privilege.
+#define	ZM_DB_PASSB			"zmuserzm"	// Unprivileged DB user password
 
-#define EVENT_DIR	"events"
+#define EVENT_DIR			"events"	// Event directory relative to web directory
+#define BLEND_PERC			10			// Percentage of new image going into reference image.
+#define WARMUP_COUNT		25			// How many images to process before looking for events
+#define PRE_EVENT_COUNT		10			// How many images to hold and prepend to an alarm event
+#define POST_EVENT_COUNT	10			// How many unalarmed images must occur before the alarm state is reset
+#define IMAGE_BUFFER_COUNT	100			// Size of circular image buffer, should be at least twice the size of the pre_event_count
+#define FPS_REPORT_INTERVAL	200			// How many images should be captured/processed before reporting the current FPS