diff --git a/.vscode/c_cpp_properties.json b/.vscode/c_cpp_properties.json
new file mode 100644
index 0000000..2e1a7ea
--- /dev/null
+++ b/.vscode/c_cpp_properties.json
@@ -0,0 +1,17 @@
+{
+    "configurations": [
+        {
+            "name": "Mac",
+            "includePath": [
+                "${workspaceFolder}/**"
+            ],
+            "defines": [],
+            "macFrameworkPath": [],
+            "compilerPath": "/opt/homebrew/bin/arm-none-eabi-gcc",
+            "cStandard": "gnu17",
+            "cppStandard": "gnu++14",
+            "intelliSenseMode": "macos-gcc-arm"
+        }
+    ],
+    "version": 4
+}
\ No newline at end of file
diff --git a/config/corne.keymap b/config/corne.keymap
index e57b24f..2e6cfd3 100644
--- a/config/corne.keymap
+++ b/config/corne.keymap
@@ -8,6 +8,11 @@
 #include <dt-bindings/zmk/keys.h>
 #include <dt-bindings/zmk/bt.h>
 
+#define DEFAULT 0
+#define LOWER  1
+#define RAISE  2
+#define ADJUST 3
+
 / {
         keymap {
                 compatible = "zmk,keymap";
@@ -35,7 +40,7 @@
    &kp ESC    &kp N1       &kp N2       &kp N3       &kp N4 &kp N5 &kp N6 &kp N7 &kp N8 &kp N9 &kp N0 &kp BSPC
    &trans &kp F1 &kp F2 &kp F3 &kp F4 &kp F5         &kp LEFT &kp DOWN &kp UP &kp RIGHT &trans &trans
    &kp LSHFT  &kp F6 &kp F7 &kp F8 &kp F9 &kp F10    &bt BT_SEL 0 &bt BT_SEL 1 &bt BT_SEL 2 &bt BT_SEL 3 &bt BT_SEL 4 &bt BT_CLR
-                            &kp LGUI &trans &kp RET  &kp SPACE &trans &kp RALT
+                            &kp LGUI &trans &kp RET  &kp SPACE &mo 3 &kp RALT
                         >;
                 };
 
@@ -43,14 +48,28 @@
 // -----------------------------------------------------------------------------------------
 // |  ESC |  !  |  @  |  #  |  $  |  %  |   |  ^  |  &  |  *  |  (  |  )  | BKSP |
 // | MUTE |VOLDN|VOLUP| PREV| NEXT| PLAY|   |  -  |  =  |  {  |  }  |  \  |  `   |
-// | CAPS |     |     |     | BRID| BRIU|   |  _  |  +  |  [  |  ]  | "|" |  ~   |
+// | SHFT |     |     |     | BRID| BRIU|   |  _  |  +  |  [  |  ]  | "|" |  ~   |
 //                    | GUI |     | ENT |   | SPC |     | ALT |
                         bindings = <
    &kp  ESC  &kp EXCL &kp AT &kp HASH &kp DLLR &kp PRCNT                    &kp CARET &kp AMPS  &kp KP_MULTIPLY &kp LPAR &kp RPAR &kp BSPC
    &kp C_MUTE  &kp C_VOL_DN  &kp C_VOL_UP  &kp C_PREV  &kp C_NEXT &kp C_PP  &kp MINUS &kp EQUAL &kp LBRC &kp RBRC  &kp BSLH &kp GRAVE
-   &kp CAPS &trans   &trans &trans   &kp C_BRI_DN  &kp C_BRI_UP             &kp UNDER &kp PLUS  &kp LBKT &kp RBKT &kp PIPE &kp TILDE
-                    	             &kp LGUI &trans   &kp RET  &kp SPACE   &trans    &kp RALT
+   &kp LSHIFT &trans   &trans &trans   &kp C_BRI_DN  &kp C_BRI_UP             &kp UNDER &kp PLUS  &kp LBKT &kp RBKT &kp PIPE &kp TILDE
+                    	             &kp LGUI &mo 3 &kp RET              &kp SPACE  &trans  &kp RALT
+                        >;
+                };
+                adjust_layer {
+// -----------------------------------------------------------------------------------------
+// |  ESC |     |     |     |     |     |   |     |     |     |     |     | BKSP |
+// | BTCLR| BT1 | BT2 | BT3 | BT4 | BT5 |   |     |     |     |     |     |      |
+// | CAPS |     |     |     |     |     |   |     |     |     |     |     |      |
+//                    | GUI |     | ENT |   | SPC |     | ALT |
+                        bindings = <
+   &trans  &trans &trans &trans &trans &trans                                   &trans &trans &trans &trans &trans &trans 
+   &bt BT_CLR &bt BT_SEL 0 &bt BT_SEL 1 &bt BT_SEL 2 &bt BT_SEL 3 &bt BT_SEL 4  &trans &trans &trans &trans &trans &trans
+   & CAPS &trans &trans &trans &trans &trans                                    &trans &trans &trans &trans &trans &trans
+                                        &trans &trans &trans                    &trans &trans &trans 
                         >;
                 };
         };
+        };
 };