diff --git a/README.md b/README.md
index eccb1bd7..19bea53b 100644
--- a/README.md
+++ b/README.md
@@ -273,6 +273,12 @@ Files and Directories
 
 
 
+Conding Style
+-------------
+- Doesn't use Tab to indent, use 4-spaces instead.
+
+
+
 Other Keyboard Firmware Projects
 ------------------
 See [doc/other_projects.md](doc/other_projects.md).
diff --git a/doc/build.md b/doc/build.md
index 5185e803..88504f09 100644
--- a/doc/build.md
+++ b/doc/build.md
@@ -160,5 +160,20 @@ Config.h Options
     /* Locking CapsLock resynchronize hack */
     #define CAPSLOCK_LOCKING_RESYNC_ENABLE
 
+### 3. Disable Debug and Print
 
+    /* disable debug print */
+    #define NO_DEBUG
 
+    /* disable print */
+    #define NO_PRINT
+
+### 4. Disable Action Features
+
+    #define NO_ACTION_LAYER
+    #define NO_ACTION_TAPPING
+    #define NO_ACTION_ONESHOT
+    #define NO_ACTION_MACRO
+    #define NO_ACTION_FUNCTION
+
+***TBD***