diff --git a/keyboards/helix/rev2/config.h b/keyboards/helix/rev2/config.h
index 5905627760..e8ad1b9bed 100644
--- a/keyboards/helix/rev2/config.h
+++ b/keyboards/helix/rev2/config.h
@@ -56,7 +56,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 /* ws2812 RGB LED */
 #define RGB_DI_PIN D3
 #define RGBLIGHT_TIMER
-#define RGBLED_NUM 12    // Number of LEDs
+//#define RGBLED_NUM 12    // Number of LEDs. see ./keymaps/default/config.h
 #define ws2812_PORTREG  PORTD
 #define ws2812_DDRREG   DDRD
 
diff --git a/keyboards/helix/rev2/keymaps/default/config.h b/keyboards/helix/rev2/keymaps/default/config.h
index 53ff0b3ca8..987c9b0d19 100644
--- a/keyboards/helix/rev2/keymaps/default/config.h
+++ b/keyboards/helix/rev2/keymaps/default/config.h
@@ -36,7 +36,10 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 // #define EE_HANDS
 
 // Helix keyboard OLED support
-//#define SSD1306OLED
+//      see ./rules.mk: OLED_ENABLE=yes or no
+#ifdef OLED_ENABLE
+  #define SSD1306OLED
+#endif
 
 /* Select rows configuration */
 // Rows are 4 or 5
@@ -62,12 +65,19 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define TAPPING_FORCE_HOLD
 #define TAPPING_TERM 100
 
+// Helix keyboard RGB LED support
+//#define RGBLIGHT_ANIMATIONS : see ./rules.mk: LED_ANIMATIONS = yes or no
+//    see ./rules.mk: LED_BACK_ENABLE or LED_UNDERGLOW_ENABLE set yes
+#ifdef RGBLED_BACK
+  #if HELIX_ROWS == 4
+    #define RGBLED_NUM 25
+  #elif HELIX_ROWS == 5
+    #define RGBLED_NUM 32
+  #endif
+#else
+  #define RGBLED_NUM 6
+#endif
 
-#undef RGBLED_NUM
-#define RGBLIGHT_ANIMATIONS
-// Helix keyboard : see ./rules.mk: RGBLIGHT_ENABLE = yes or no
-// Helix keyboard : RGBLED_NUM 6 or 32
-#define RGBLED_NUM 6
 #if RGBLED_NUM <= 6
   #define RGBLIGHT_LIMIT_VAL 255
 #else
diff --git a/keyboards/helix/rev2/keymaps/default/rules.mk b/keyboards/helix/rev2/keymaps/default/rules.mk
index f4d3454351..1705579ad8 100644
--- a/keyboards/helix/rev2/keymaps/default/rules.mk
+++ b/keyboards/helix/rev2/keymaps/default/rules.mk
@@ -14,14 +14,62 @@ MIDI_ENABLE = no            # MIDI controls
 AUDIO_ENABLE = no           # Audio output on port C6
 UNICODE_ENABLE = no         # Unicode
 BLUETOOTH_ENABLE = no       # Enable Bluetooth with the Adafruit EZ-Key HID
-# Helix keyboard : see ./config.h: RGBLED_NUM 6 or 32
-# Helix keyboard : RGBLIGHT_ENABLE = no or yes
 RGBLIGHT_ENABLE = no        # Enable WS2812 RGB underlight.  Do not enable this with audio at the same time.
 ONEHAND_ENABLE = no        # Enable one-hand typing
 
+define HELIX_CUSTOMISE_MSG
+  $(info Helix customize)
+  $(info -  OLED_ENABLE=$(OLED_ENABLE))
+  $(info -  LED_BACK_ENABLE=$(LED_BACK_ENABLE))
+  $(info -  LED_UNDERGLOW_ENABLE=$(LED_UNDERGLOW_ENABLE))
+  $(info -  LED_ANIMATION=$(LED_ANIMATIONS))
+endef
+
+# Helix keyboard customize
+# you can edit follows 4 Variables
+#  jp: 以下の4つの変数を必要に応じて編集します。
+OLED_ENABLE = no            # OLED_ENABLE
+LED_BACK_ENABLE = no        # LED backlight (Enable WS2812 RGB underlight.)
+LED_UNDERGLOW_ENABLE = no   # LED underglow (Enable WS2812 RGB underlight.)
+LED_ANIMATIONS = yes        # LED animations
+
+####  LED_BACK_ENABLE and LED_UNDERGLOW_ENABLE.
+####    Do not enable these with audio at the same time.
+
+# Uncomment these for checking
+#   jp: コンパイル時にカスタマイズの状態を表示したい時はコメントをはずします。
+# $(eval $(call HELIX_CUSTOMISE_MSG))
+# $(info )
+
+ifeq ($(strip $(LED_BACK_ENABLE)), yes)
+  RGBLIGHT_ENABLE = yes
+  OPT_DEFS += -DRGBLED_BACK
+  ifeq ($(strip $(LED_UNDERGLOW_ENABLE)), yes)
+    $(eval $(call HELIX_CUSTOMISE_MSG))
+    $(error LED_BACK_ENABLE and LED_UNDERGLOW_ENABLE both 'yes')
+  endif
+else ifeq ($(strip $(LED_UNDERGLOW_ENABLE)), yes)
+  RGBLIGHT_ENABLE = yes
+else
+  RGBLIGHT_ENABLE = no
+endif
+
+ifeq ($(strip $(LED_ANIMATIONS)), yes)
+    OPT_DEFS += -DRGBLIGHT_ANIMATIONS
+endif
+
+ifeq ($(strip $(OLED_ENABLE)), yes)
+    OPT_DEFS += -DOLED_ENABLE
+endif
+
 # Do not enable SLEEP_LED_ENABLE. it uses the same timer as BACKLIGHT_ENABLE
 SLEEP_LED_ENABLE = no    # Breathing sleep LED during USB suspend
 
 ifndef QUANTUM_DIR
 	include ../../../../Makefile
 endif
+
+# Uncomment these for debugging
+# $(info -- RGBLIGHT_ENABLE=$(RGBLIGHT_ENABLE))
+# $(info -- OPT_DEFS=$(OPT_DEFS))
+# $(info )