diff --git a/model/serializeConfig.js b/model/serializeConfig.js
index c1c5217d..2900b1a6 100755
--- a/model/serializeConfig.js
+++ b/model/serializeConfig.js
@@ -14,20 +14,23 @@ var ARRAY_LAST_ELEMENT_ID = 0;
 
 var KEY_ACTION_ID_KEYSTROKE_SCANCODE_FIRST        = 1;
 var KEY_ACTION_ID_KEYSTROKE_SCANCODE_LAST         = 231;
-var KEY_ACTION_ID_DUAL_ROLE_KEYSTROKE_MOD         = 232;
-var KEY_ACTION_ID_DUAL_ROLE_KEYSTROKE_FN          = 233;
-var KEY_ACTION_ID_DUAL_ROLE_KEYSTROKE_MOUSE       = 234;
-var KEY_ACTION_ID_DUAL_ROLE_KEYSTROKE_LEFT_CTRL   = 235;
-var KEY_ACTION_ID_DUAL_ROLE_KEYSTROKE_LEFT_SHIFT  = 236;
-var KEY_ACTION_ID_DUAL_ROLE_KEYSTROKE_LEFT_ALT    = 237;
-var KEY_ACTION_ID_DUAL_ROLE_KEYSTROKE_LEFT_SUPER  = 238;
-var KEY_ACTION_ID_DUAL_ROLE_KEYSTROKE_RIGHT_CTRL  = 239;
-var KEY_ACTION_ID_DUAL_ROLE_KEYSTROKE_RIGHT_SHIFT = 240;
-var KEY_ACTION_ID_DUAL_ROLE_KEYSTROKE_RIGHT_ALT   = 241;
-var KEY_ACTION_ID_DUAL_ROLE_KEYSTROKE_RIGHT_SUPER = 242;
-var KEY_ACTION_ID_MOUSE                           = 243;
-var KEY_ACTION_ID_PLAY_MACRO                      = 244;
-var KEY_ACTION_ID_SWITCH_KEYMAP                   = 245;
+var KEY_ACTION_ID_SWITCH_LAYER_MOD                = 232;
+var KEY_ACTION_ID_SWITCH_LAYER_FN                 = 233;
+var KEY_ACTION_ID_SWITCH_LAYER_MOUSE              = 234;
+var KEY_ACTION_ID_DUAL_ROLE_KEYSTROKE_MOD         = 235;
+var KEY_ACTION_ID_DUAL_ROLE_KEYSTROKE_FN          = 236;
+var KEY_ACTION_ID_DUAL_ROLE_KEYSTROKE_MOUSE       = 237;
+var KEY_ACTION_ID_DUAL_ROLE_KEYSTROKE_LEFT_CTRL   = 238;
+var KEY_ACTION_ID_DUAL_ROLE_KEYSTROKE_LEFT_SHIFT  = 239;
+var KEY_ACTION_ID_DUAL_ROLE_KEYSTROKE_LEFT_ALT    = 240;
+var KEY_ACTION_ID_DUAL_ROLE_KEYSTROKE_LEFT_SUPER  = 241;
+var KEY_ACTION_ID_DUAL_ROLE_KEYSTROKE_RIGHT_CTRL  = 242;
+var KEY_ACTION_ID_DUAL_ROLE_KEYSTROKE_RIGHT_SHIFT = 243;
+var KEY_ACTION_ID_DUAL_ROLE_KEYSTROKE_RIGHT_ALT   = 244;
+var KEY_ACTION_ID_DUAL_ROLE_KEYSTROKE_RIGHT_SUPER = 245;
+var KEY_ACTION_ID_MOUSE                           = 246;
+var KEY_ACTION_ID_PLAY_MACRO                      = 247;
+var KEY_ACTION_ID_SWITCH_KEYMAP                   = 248;
 var KEY_ACTION_ID_NONE                            = 255;
 
 var NONE_ACTION_PADDING = 0;
diff --git a/model/uhk-config.json b/model/uhk-config.json
index 25f7aaa4..f5064840 100644
--- a/model/uhk-config.json
+++ b/model/uhk-config.json
@@ -29,6 +29,10 @@
                                     "scancode": 120,
                                     "modifierMask": 16
                                 },
+                                {
+                                    "actionType": "switchLayer",
+                                    "layer": "fn"
+                                },
                                 {
                                     "actionType": "dualRoleKeystroke",
                                     "scancode": 111,