1 files changed, 16 insertions, 4 deletions

diff --git a/docs/feature_rgb_matrix.md b/docs/feature_rgb_matrix.md
index 4ce9d15f0..91ec77ace 100644
--- a/docs/feature_rgb_matrix.md
+++ b/docs/feature_rgb_matrix.md
@@ -127,13 +127,13 @@ Configure the hardware via your `config.h`:
 From this point forward the configuration is the same for all the drivers. The struct rgb_led array tells the system for each led, what key electrical matrix it represents, what the physical position is on the board, and if the led is for a modifier key or not. Here is a brief example:
 
 ```C
-const rgb_led g_rgb_leds[DRIVER_LED_TOTAL] = {
+rgb_led g_rgb_leds[DRIVER_LED_TOTAL] = {
 /*  {row | col << 4}
     *    |         {x=0..224, y=0..64}
-    *    |            |              modifier
+    *    |            |              flags
     *    |            |                | */
     {{0|(0<<4)},   {20.36*0, 21.33*0}, 1},
-    {{0|(1<<4)},   {20.36*1, 21.33*0}, 1},
+    {{0|(1<<4)},   {20.36*1, 21.33*0}, 4},
     ....
 }
 ```
@@ -147,7 +147,19 @@ y =  64 / (NUMBER_OF_ROWS - 1) * ROW_POSITION
 
 Where NUMBER_OF_COLS, NUMBER_OF_ROWS, COL_POSITION, & ROW_POSITION are all based on the physical layout of your keyboard, not the electrical layout.
 
-`modifier` is a boolean, whether or not a certain key is considered a modifier (used in some effects).
+`flags` is a bitmask, whether or not a certain LEDs is of a certain type. It is recommended that LEDs are set to only 1 type.
+
+## Flags
+
+|Define                              |Description                                |
+|------------------------------------|-------------------------------------------|
+|`#define HAS_FLAGS(bits, flags)`    |Returns true if `bits` has all `flags` set.|
+|`#define HAS_ANY_FLAGS(bits, flags)`|Returns true if `bits` has any `flags` set.|
+|`#define LED_FLAG_NONE      0x00`   |If thes LED has no flags.                  |
+|`#define LED_FLAG_ALL       0xFF`   |If thes LED has all flags.                 |
+|`#define LED_FLAG_MODIFIER  0x01`   |If the Key for this LED is a modifier.     |
+|`#define LED_FLAG_UNDERGLOW 0x02`   |If the LED is for underglow.               |
+|`#define LED_FLAG_KEYLIGHT  0x04`   |If the LED is for key backlight.           |
 
 ## Keycodes