diff --git a/src/board/system76/darp5/include/board/keymap.h b/src/board/system76/darp5/include/board/keymap.h
index b671426..eacd404 100644
--- a/src/board/system76/darp5/include/board/keymap.h
+++ b/src/board/system76/darp5/include/board/keymap.h
@@ -3,11 +3,6 @@
 
 #include <common/keymap.h>
 
-// Extra SCI layer for keyboard backlight control
-#define KT_SCI_EXTRA (0x4000)
-
-#define SCI_EXTRA (0x50)
-
 #define ___ 0
 
 // Conversion of physical layout to keyboard matrix
diff --git a/src/board/system76/galp3-c/include/board/keymap.h b/src/board/system76/galp3-c/include/board/keymap.h
index 3bd63e4..e24dce1 100644
--- a/src/board/system76/galp3-c/include/board/keymap.h
+++ b/src/board/system76/galp3-c/include/board/keymap.h
@@ -3,12 +3,6 @@
 
 #include <common/keymap.h>
 
-// Extra SCI layer for keyboard backlight control
-#define KT_SCI_EXTRA (0x4000)
-
-#define SCI_EXTRA (0x50)
-#define SCI_EXTRA_KBD_BKL (0x8A)
-
 #define ___ 0
 
 // Conversion of physical layout to keyboard matrix
diff --git a/src/board/system76/lemp9/include/board/keymap.h b/src/board/system76/lemp9/include/board/keymap.h
index b18468d..cf81558 100644
--- a/src/board/system76/lemp9/include/board/keymap.h
+++ b/src/board/system76/lemp9/include/board/keymap.h
@@ -3,12 +3,6 @@
 
 #include <common/keymap.h>
 
-// Extra SCI layer for keyboard backlight control
-#define KT_SCI_EXTRA (0x4000)
-
-#define SCI_EXTRA (0x50)
-#define SCI_EXTRA_KBD_BKL (0x8A)
-
 #define ___ 0
 
 // Conversion of physical layout to keyboard matrix
diff --git a/src/common/include/common/keymap.h b/src/common/include/common/keymap.h
index d8c5063..592f95a 100644
--- a/src/common/include/common/keymap.h
+++ b/src/common/include/common/keymap.h
@@ -15,14 +15,28 @@ uint16_t keymap_translate(uint16_t key);
 // Layer selection
 #define KT_FN (0x1000)
 
-// SCI
-#define KT_SCI (0x2000)
+// Combinations
+#define KT_COMBO (0x2000)
 
+#define COMBO_PRINT_SCREEN 0
+#define K_PRINT_SCREEN (KT_COMBO | COMBO_PRINT_SCREEN)
+
+// SCI
+#define KT_SCI (0x4000)
+
+#define SCI_DISPLAY_TOGGLE (0x0B)
+#define SCI_DISPLAY_MODE (0x10)
 #define SCI_BRIGHTNESS_DOWN (0x11)
 #define SCI_BRIGHTNESS_UP (0x12)
 #define SCI_CAMERA_TOGGLE (0x13)
 #define SCI_AIRPLANE_MODE (0x14)
 #define SCI_SUSPEND (0x15)
+#define SCI_EXTRA (0x50)
+
+// Extra SCI layer for keyboard backlight control
+#define KT_SCI_EXTRA (0x8000)
+
+#define SCI_EXTRA_KBD_BKL (0x8A)
 
 // See http://www.techtoys.com.hk/Downloads/Download/Microchip/PS2_driver/ScanCode.pdf