diff --git a/Platformio/src/device_appleTV/gui_appleTV.cpp b/Platformio/src/device_appleTV/gui_appleTV.cpp
index f2366e2..f24695d 100644
--- a/Platformio/src/device_appleTV/gui_appleTV.cpp
+++ b/Platformio/src/device_appleTV/gui_appleTV.cpp
@@ -1,6 +1,7 @@
 #include <lvgl.h>
 #include "device_appleTV/device_appleTV.h"
 #include "gui_general_and_keys/gui_base.h"
+#include "gui_general_and_keys/gui_registry.h"
 #include "hardware/tft.h"
 #include "commandHandler.h"
 
@@ -16,7 +17,7 @@ static void appleKey_event_cb(lv_event_t* e) {
   Serial.println(50 + (int)e->user_data);
 }
 
-void init_gui_appleTV(lv_obj_t* tabview) {
+void init_gui_tab_appleTV(lv_obj_t* tabview) {
 
   lv_obj_t* tab = lv_tabview_add_tab(tabview, "Apple TV");
 
@@ -54,7 +55,7 @@ void init_gui_appleTV(lv_obj_t* tabview) {
   
 }
 
-void init_gui_pageIndicator_appleTV() {
+void init_gui_pageIndicator_appleTV(lv_obj_t* panel) {
   // Create actual (non-clickable) buttons for every tab
   lv_obj_t* btn = lv_btn_create(panel);
   lv_obj_clear_flag(btn, LV_OBJ_FLAG_CLICKABLE);
@@ -66,3 +67,7 @@ void init_gui_pageIndicator_appleTV() {
   lv_obj_set_style_bg_color(btn, color_primary, LV_PART_MAIN);
 
 }
+
+void register_gui_appleTV(void){
+  register_gui(& init_gui_tab_appleTV, & init_gui_pageIndicator_appleTV);
+}
diff --git a/Platformio/src/device_appleTV/gui_appleTV.h b/Platformio/src/device_appleTV/gui_appleTV.h
index 15a4c47..b7dd127 100644
--- a/Platformio/src/device_appleTV/gui_appleTV.h
+++ b/Platformio/src/device_appleTV/gui_appleTV.h
@@ -3,7 +3,6 @@
 
 #include <lvgl.h>
 
-void init_gui_appleTV(lv_obj_t* tabview);
-void init_gui_pageIndicator_appleTV();
+void register_gui_appleTV(void);
 
 #endif /*__GUI_APPLETV_H__*/
diff --git a/Platformio/src/device_smarthome/gui_smarthome.cpp b/Platformio/src/device_smarthome/gui_smarthome.cpp
index 2c869c3..e94d704 100644
--- a/Platformio/src/device_smarthome/gui_smarthome.cpp
+++ b/Platformio/src/device_smarthome/gui_smarthome.cpp
@@ -1,6 +1,7 @@
 #include <string>
 #include <lvgl.h>
 #include "gui_general_and_keys/gui_base.h"
+#include "gui_general_and_keys/gui_registry.h"
 #include "hardware/tft.h"
 #include "device_smarthome/device_smarthome.h"
 #include "commandHandler.h"
@@ -33,7 +34,7 @@ static void smartHomeSlider_event_cb(lv_event_t * e){
   #endif
 }
 
-void init_gui_smarthome(lv_obj_t* tabview) {
+void init_gui_tab_smarthome(lv_obj_t* tabview) {
 
   lv_obj_t* tab = lv_tabview_add_tab(tabview, "Smart Home");
 
@@ -127,7 +128,7 @@ void init_gui_smarthome(lv_obj_t* tabview) {
 
 }
 
-void init_gui_pageIndicator_smarthome() {
+void init_gui_pageIndicator_smarthome(lv_obj_t* panel) {
   // Create actual (non-clickable) buttons for every tab
   lv_obj_t* btn = lv_btn_create(panel);
   lv_obj_clear_flag(btn, LV_OBJ_FLAG_CLICKABLE);
@@ -139,3 +140,7 @@ void init_gui_pageIndicator_smarthome() {
   lv_obj_set_style_bg_color(btn, color_primary, LV_PART_MAIN);
 
 }
+
+void register_gui_smarthome(void){
+  register_gui(& init_gui_tab_smarthome, & init_gui_pageIndicator_smarthome);
+}
diff --git a/Platformio/src/device_smarthome/gui_smarthome.h b/Platformio/src/device_smarthome/gui_smarthome.h
index 1e587a0..c283431 100644
--- a/Platformio/src/device_smarthome/gui_smarthome.h
+++ b/Platformio/src/device_smarthome/gui_smarthome.h
@@ -3,7 +3,6 @@
 
 #include <lvgl.h>
 
-void init_gui_smarthome(lv_obj_t* tabview);
-void init_gui_pageIndicator_smarthome();
+void register_gui_smarthome(void);
 
 #endif /*__GUI_SMARTHOME_H__*/
diff --git a/Platformio/src/gui_general_and_keys/gui_base.cpp b/Platformio/src/gui_general_and_keys/gui_base.cpp
index 1ebadf1..e1a5100 100644
--- a/Platformio/src/gui_general_and_keys/gui_base.cpp
+++ b/Platformio/src/gui_general_and_keys/gui_base.cpp
@@ -2,11 +2,7 @@
 #include "hardware/tft.h"
 #include "hardware/sleep.h"
 #include "gui_general_and_keys/gui_base.h"
-#include "gui_general_and_keys/gui_irReceiver.h"
-#include "gui_general_and_keys/gui_numpad.h"
-#include "gui_general_and_keys/gui_settings.h"
-#include "device_appleTV/gui_appleTV.h"
-#include "device_smarthome/gui_smarthome.h"
+#include "gui_general_and_keys/gui_registry.h"
 
 lv_obj_t* panel;
 lv_color_t color_primary = lv_color_hex(0x303030); // gray
@@ -123,11 +119,7 @@ void init_gui(void) {
   lv_obj_align(tabview, LV_ALIGN_TOP_MID, 0, 20);
 
   // Add all the tabs here
-  init_gui_irReceiver(tabview);
-  init_gui_settings(tabview);
-  init_gui_numpad(tabview);
-  init_gui_appleTV(tabview);
-  init_gui_smarthome(tabview);
+  create_gui_tabs_from_gui_registry(tabview);
 
   // Set current page according to the current screen
   lv_tabview_set_act(tabview, currentScreen, LV_ANIM_OFF); 
@@ -147,11 +139,7 @@ void init_gui(void) {
   lv_obj_set_style_opa(btn, LV_OPA_TRANSP, LV_PART_MAIN);
   
   // Create actual (non-clickable) buttons for every tab
-  init_gui_pageIndicator_irReceiver();
-  init_gui_pageIndicator_settings();
-  init_gui_pageIndicator_numpad();
-  init_gui_pageIndicator_appleTV();
-  init_gui_pageIndicator_smarthome();
+  create_gui_pageIndicators_from_gui_registry(panel);
   
   // This small hidden button enables the page indicator to scroll further
   btn = lv_btn_create(panel);
diff --git a/Platformio/src/gui_general_and_keys/gui_base.h b/Platformio/src/gui_general_and_keys/gui_base.h
index 43aee4e..c276f95 100644
--- a/Platformio/src/gui_general_and_keys/gui_base.h
+++ b/Platformio/src/gui_general_and_keys/gui_base.h
@@ -1,5 +1,5 @@
-#ifndef __GUI_H__
-#define __GUI_H__
+#ifndef __GUI_BASE_H__
+#define __GUI_BASE_H__
 
 #include <lvgl.h>
 #include "../hardware/tft.h"
@@ -9,7 +9,6 @@ LV_IMG_DECLARE(high_brightness);
 LV_IMG_DECLARE(low_brightness);
 extern lv_obj_t* objBattPercentage;
 extern lv_obj_t* objBattIcon;
-extern lv_obj_t* panel;
 extern lv_color_t color_primary;
 
 extern lv_obj_t* WifiLabel;
@@ -20,4 +19,4 @@ extern byte currentScreen; // Current screen that is shown
 void init_gui(void);
 void gui_loop(void);
 
-#endif /*__GUI_H__*/
+#endif /*__GUI_BASE_H__*/
diff --git a/Platformio/src/gui_general_and_keys/gui_irReceiver.cpp b/Platformio/src/gui_general_and_keys/gui_irReceiver.cpp
index fe7dac4..d73d130 100644
--- a/Platformio/src/gui_general_and_keys/gui_irReceiver.cpp
+++ b/Platformio/src/gui_general_and_keys/gui_irReceiver.cpp
@@ -5,6 +5,7 @@
 #include "hardware/sleep.h"
 #include "hardware/infrared_receiver.h"
 #include "gui_general_and_keys/gui_base.h"
+#include "gui_general_and_keys/gui_registry.h"
 
 lv_obj_t* menuBoxToggle;
 lv_obj_t* menuBoxMessages;
@@ -82,7 +83,7 @@ static void IRReceiverOnSetting_event_cb(lv_event_t * e){
   }
 }
 
-void init_gui_irReceiver(lv_obj_t* tabview) {
+void init_gui_tab_irReceiver(lv_obj_t* tabview) {
 
   lv_obj_t* tab = lv_tabview_add_tab(tabview, "IR Receiver");
 
@@ -121,7 +122,7 @@ void init_gui_irReceiver(lv_obj_t* tabview) {
   printReceivedMessages(true);
 }
 
-void init_gui_pageIndicator_irReceiver() {
+void init_gui_pageIndicator_irReceiver(lv_obj_t* panel) {
   // Create actual (non-clickable) buttons for every tab
   lv_obj_t* btn = lv_btn_create(panel);
   lv_obj_clear_flag(btn, LV_OBJ_FLAG_CLICKABLE);
@@ -132,3 +133,7 @@ void init_gui_pageIndicator_irReceiver() {
   lv_obj_set_style_shadow_width(btn, 0, LV_PART_MAIN);
   lv_obj_set_style_bg_color(btn, color_primary, LV_PART_MAIN);
 }
+
+void register_gui_irReceiver(void){
+  register_gui(& init_gui_tab_irReceiver, & init_gui_pageIndicator_irReceiver);
+}
diff --git a/Platformio/src/gui_general_and_keys/gui_irReceiver.h b/Platformio/src/gui_general_and_keys/gui_irReceiver.h
index 435ee74..7320235 100644
--- a/Platformio/src/gui_general_and_keys/gui_irReceiver.h
+++ b/Platformio/src/gui_general_and_keys/gui_irReceiver.h
@@ -4,8 +4,7 @@
 #include <lvgl.h>
 #include <string>
 
-void init_gui_irReceiver(lv_obj_t* tabview);
-void init_gui_pageIndicator_irReceiver();
+void register_gui_irReceiver(void);
 void showNewIRmessage(String);
 
 #endif /*__GUI_IRRECEIVER_H__*/
diff --git a/Platformio/src/gui_general_and_keys/gui_numpad.cpp b/Platformio/src/gui_general_and_keys/gui_numpad.cpp
index 13a4ef8..c34d11a 100644
--- a/Platformio/src/gui_general_and_keys/gui_numpad.cpp
+++ b/Platformio/src/gui_general_and_keys/gui_numpad.cpp
@@ -1,6 +1,7 @@
 #include <lvgl.h>
 #include "hardware/tft.h"
 #include "gui_general_and_keys/gui_base.h"
+#include "gui_general_and_keys/gui_registry.h"
 #include "commandHandler.h"
 
 // Virtual Keypad Event handler
@@ -16,7 +17,7 @@ static void virtualKeypad_event_cb(lv_event_t* e) {
   executeCommand(KEYBOARD_SENDSTRING, numberStr);
 }
 
-void init_gui_numpad(lv_obj_t* tabview) {
+void init_gui_tab_numpad(lv_obj_t* tabview) {
 
   lv_obj_t* tab = lv_tabview_add_tab(tabview, "Numpad");
 
@@ -71,7 +72,7 @@ void init_gui_numpad(lv_obj_t* tabview) {
 
 }
 
-void init_gui_pageIndicator_numpad() {
+void init_gui_pageIndicator_numpad(lv_obj_t* panel) {
   // Create actual (non-clickable) buttons for every tab
   lv_obj_t* btn = lv_btn_create(panel);
   lv_obj_clear_flag(btn, LV_OBJ_FLAG_CLICKABLE);
@@ -83,3 +84,7 @@ void init_gui_pageIndicator_numpad() {
   lv_obj_set_style_bg_color(btn, color_primary, LV_PART_MAIN);
 
 }
+
+void register_gui_numpad(void){
+  register_gui(& init_gui_tab_numpad, & init_gui_pageIndicator_numpad);
+}
diff --git a/Platformio/src/gui_general_and_keys/gui_numpad.h b/Platformio/src/gui_general_and_keys/gui_numpad.h
index c84b300..7cdb1af 100644
--- a/Platformio/src/gui_general_and_keys/gui_numpad.h
+++ b/Platformio/src/gui_general_and_keys/gui_numpad.h
@@ -3,7 +3,6 @@
 
 #include <lvgl.h>
 
-void init_gui_numpad(lv_obj_t* tabview);
-void init_gui_pageIndicator_numpad();
+void register_gui_numpad(void);
 
 #endif /*__GUI_NUMPAD_H__*/
diff --git a/Platformio/src/gui_general_and_keys/gui_registry.cpp b/Platformio/src/gui_general_and_keys/gui_registry.cpp
new file mode 100644
index 0000000..4a8f2d9
--- /dev/null
+++ b/Platformio/src/gui_general_and_keys/gui_registry.cpp
@@ -0,0 +1,31 @@
+#include <string>
+#include <list>
+#include <lvgl.h>
+#include "gui_registry.h"
+
+// https://stackoverflow.com/questions/840501/how-do-function-pointers-in-c-work
+struct gui_functions {
+  init_gui_tab this_init_gui_tab;
+  init_gui_pageIndicator this_init_gui_pageIndicator;
+};
+
+std::list<gui_functions> registered_guis;
+
+void register_gui(init_gui_tab a_init_gui_tab, init_gui_pageIndicator a_gui_pageIndicator) {
+  registered_guis.push_back(gui_functions{a_init_gui_tab, a_gui_pageIndicator});
+
+}
+
+void create_gui_tabs_from_gui_registry(lv_obj_t* tabview) {
+  std::list<gui_functions>::iterator it;
+  for (it = registered_guis.begin(); it != registered_guis.end(); ++it) {
+    it->this_init_gui_tab(tabview);
+  }
+}
+
+void create_gui_pageIndicators_from_gui_registry(lv_obj_t* panel) {
+  std::list<gui_functions>::iterator it;
+  for (it = registered_guis.begin(); it != registered_guis.end(); ++it) {
+    it->this_init_gui_pageIndicator(panel);
+  }
+}
diff --git a/Platformio/src/gui_general_and_keys/gui_registry.h b/Platformio/src/gui_general_and_keys/gui_registry.h
new file mode 100644
index 0000000..6c2f0ee
--- /dev/null
+++ b/Platformio/src/gui_general_and_keys/gui_registry.h
@@ -0,0 +1,24 @@
+/*
+  If you want to create a new GUI for the touch screen, then
+  - copy one of the existing GUIs, e.g. gui_numpad.cpp and gui_numpad.h
+  - place the files in the right folder:
+    - in folder "gui_general_and_keys" if they are of general purpose, not only for a specific device
+    - in the device folder, if the GUI is specific for a certain device
+    - in folder "scenes" if the GUI is intended for a specific scene
+    It does not really matter where the files are placed, but doing so helps to keep a clean structure
+  - rename the functions, they must not have the same name as the ones in the file you copied from
+  - call "register_gui_<nameOfGUI>();" in main.cpp
+
+  Technically spoken, to register a GUI, you need to provide two function pointers:
+  - one for creating the tab
+  - one for creating the page indicator at the bottom of the tab
+*/
+#include <string>
+#include <lvgl.h>
+
+typedef void (*init_gui_tab)(lv_obj_t* tabview);
+typedef void (*init_gui_pageIndicator)(lv_obj_t* tabview);
+
+void register_gui(init_gui_tab a_init_gui_tab, init_gui_pageIndicator a_gui_pageIndicator);
+void create_gui_tabs_from_gui_registry(lv_obj_t* tabview);
+void create_gui_pageIndicators_from_gui_registry(lv_obj_t* panel);
\ No newline at end of file
diff --git a/Platformio/src/gui_general_and_keys/gui_settings.cpp b/Platformio/src/gui_general_and_keys/gui_settings.cpp
index 4a1eab5..347a4f9 100644
--- a/Platformio/src/gui_general_and_keys/gui_settings.cpp
+++ b/Platformio/src/gui_general_and_keys/gui_settings.cpp
@@ -2,6 +2,7 @@
 #include "hardware/tft.h"
 #include "hardware/sleep.h"
 #include "gui_general_and_keys/gui_base.h"
+#include "gui_general_and_keys/gui_registry.h"
 
 lv_obj_t* objBattSettingsVoltage;
 lv_obj_t* objBattSettingsPercentage;
@@ -35,7 +36,7 @@ static void timout_event_cb(lv_event_t * e){
   resetStandbyTimer();
 }
 
-void init_gui_settings(lv_obj_t* tabview) {
+void init_gui_tab_settings(lv_obj_t* tabview) {
 
   lv_obj_t* tab = lv_tabview_add_tab(tabview, "Settings");
 
@@ -156,7 +157,7 @@ void init_gui_settings(lv_obj_t* tabview) {
   // lv_obj_align(objBattSettingsIscharging, LV_ALIGN_TOP_LEFT, 0, 64);
 }
 
-void init_gui_pageIndicator_settings() {
+void init_gui_pageIndicator_settings(lv_obj_t* panel) {
   // Create actual (non-clickable) buttons for every tab
   lv_obj_t* btn = lv_btn_create(panel);
   lv_obj_clear_flag(btn, LV_OBJ_FLAG_CLICKABLE);
@@ -168,3 +169,7 @@ void init_gui_pageIndicator_settings() {
   lv_obj_set_style_bg_color(btn, color_primary, LV_PART_MAIN);
 
 }
+
+void register_gui_settings(void){
+  register_gui(& init_gui_tab_settings, & init_gui_pageIndicator_settings);
+}
diff --git a/Platformio/src/gui_general_and_keys/gui_settings.h b/Platformio/src/gui_general_and_keys/gui_settings.h
index c512c77..94918bf 100644
--- a/Platformio/src/gui_general_and_keys/gui_settings.h
+++ b/Platformio/src/gui_general_and_keys/gui_settings.h
@@ -7,7 +7,6 @@ extern lv_obj_t* objBattSettingsVoltage;
 extern lv_obj_t* objBattSettingsPercentage;
 //extern lv_obj_t* objBattSettingsIscharging;
 
-void init_gui_settings(lv_obj_t* tabview);
-void init_gui_pageIndicator_settings();
+void register_gui_settings(void);
 
 #endif /*__GUI_SETTINGS_H__*/
diff --git a/Platformio/src/main.cpp b/Platformio/src/main.cpp
index ff97405..2b8a075 100644
--- a/Platformio/src/main.cpp
+++ b/Platformio/src/main.cpp
@@ -18,6 +18,11 @@
 #include "device_keyboard_ble/device_keyboard_ble.h"
 #include "gui_general_and_keys/keys.h"
 #include "gui_general_and_keys/gui_base.h"
+#include "gui_general_and_keys/gui_irReceiver.h"
+#include "gui_general_and_keys/gui_settings.h"
+#include "gui_general_and_keys/gui_numpad.h"
+#include "device_appleTV/gui_appleTV.h"
+#include "device_smarthome/gui_smarthome.h"
 #include "preferences_storage.h"
 #include "commandHandler.h"
 
@@ -43,6 +48,12 @@ void setup() {
   // init TFT
   init_tft();
 
+  // Here you can register the GUIs you want to display. Will be displayed in the order they are registered.
+  register_gui_irReceiver();
+  register_gui_settings();
+  register_gui_numpad();
+  register_gui_appleTV();
+  register_gui_smarthome();
   // init GUI
   init_gui();