1 files changed, 2 insertions, 0 deletions

diff --git a/docs/feature_rgb_matrix.md b/docs/feature_rgb_matrix.md
index e996caddd..046b1f17f 100644
--- a/docs/feature_rgb_matrix.md
+++ b/docs/feature_rgb_matrix.md
@@ -447,6 +447,8 @@ These are defined in [`rgblight_list.h`](https://github.com/qmk/qmk_firmware/blo
 #define RGB_MATRIX_STARTUP_VAL RGB_MATRIX_MAXIMUM_BRIGHTNESS // Sets the default brightness value, if none has been set
 #define RGB_MATRIX_STARTUP_SPD 127 // Sets the default animation speed, if none has been set
 #define RGB_MATRIX_DISABLE_KEYCODES // disables control of rgb matrix by keycodes (must use code functions to control the feature)
+#define RGB_MATRIX_SPLIT { X, Y }       // (Optional) For split keyboards, the number of LEDs connected on each half. X = left, Y = Right.
+                                        // If RGB_MATRIX_KEYPRESSES or RGB_MATRIX_KEYRELEASES is enabled, you also will want to enable SPLIT_TRANSPORT_MIRROR
 ```
 
 ## EEPROM storage :id=eeprom-storage