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diff --git a/docs/config_options.md b/docs/config_options.md
index 94233cadc..d728a49c3 100644
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+++ b/docs/config_options.md
@@ -179,6 +179,16 @@ If you define these options you will enable the associated feature, which may in
* `#define MOUSEKEY_MAX_SPEED 7`
* `#define MOUSEKEY_WHEEL_DELAY 0`
+## Split Keyboard Options
+
+Split Keyboard specific options, make sure you have 'SPLIT_KEYBOARD = yes' in your rules.mk
+
+* `#define SPLIT_HAND_PIN B7`
+ * For using high/low pin to determine handedness, low = right hand, high = left hand. Replace 'B7' with the pin you are using. This is optional and you can still use the EEHANDS method or MASTER_LEFT / MASTER_RIGHT defines like the stock Let's Split uses.
+
+* `#define USE_I2C`
+ * For using I2C instead of Serial (defaults to serial)
+
# The `rules.mk` File
This is a [make](https://www.gnu.org/software/make/manual/make.html) file that is included by the top-level `Makefile`. It is used to set some information about the MCU that we will be compiling for as well as enabling and disabling certain features.
@@ -232,3 +242,5 @@ Use these to enable or disable building certain features. The more you have enab
* Unicode
* `BLUETOOTH_ENABLE`
* Enable Bluetooth with the Adafruit EZ-Key HID
+* `SPLIT_KEYBOARD`
+ * Enables split keyboard support (dual MCU like the let's split and bakingpy's boards) and includes all necessary files located at quantum/split_common