diff --git a/source/Common.h b/source/Common.h
index c1a83d1a..04b7a256 100644
--- a/source/Common.h
+++ b/source/Common.h
@@ -96,6 +96,9 @@ enum AppMode_e
 #define  REGVALUE_PRINTER_FILENAME   "Printer Filename"
 #define  REGVALUE_PRINTER_APPEND     "Append to printer file"
 #define  REGVALUE_PRINTER_IDLE_LIMIT "Printer idle limit"
+#define  REGVALUE_VIDEO_MODE         "Video Emulation"
+#define  REGVALUE_VIDEO_HALF_SCAN_LINES "Half Scan Lines"
+#define  REGVALUE_VIDEO_MONO_COLOR      "Monochrome Color"
 
 // Preferences 
 #define REG_PREFS							"Preferences"