diff --git a/docs/_sidebar.md b/docs/_sidebar.md
index 1f29159..bd6b350 100644
--- a/docs/_sidebar.md
+++ b/docs/_sidebar.md
@@ -14,6 +14,7 @@
   - [Timer](timer.md)
   - [Icons](icons.md)
   - [Sounds](sounds.md)
+  - [Hidden features](dev.md)
 
 - API
   - [MQTT/HTTP](api.md)
diff --git a/docs/custom.md b/docs/custom.md
index 64eecf7..d2d5345 100644
--- a/docs/custom.md
+++ b/docs/custom.md
@@ -45,4 +45,4 @@ Here's an example JSON object to display the text "Hello, AWTRIX Light!" with th
 
 ## Delete a custom app
 To delete a custom app simply send a empty payload/body to the same topic/url.
-You can also use [this API](api?id=addremove-and-rearange-apps)
+You can also use [this API](api?id=addremove-and-rearange-apps)
\ No newline at end of file
diff --git a/docs/dev.md b/docs/dev.md
new file mode 100644
index 0000000..84e92f2
--- /dev/null
+++ b/docs/dev.md
@@ -0,0 +1,15 @@
+# Hidden Features
+
+Ok, now they are no longer hidden :).  
+This section contains small setting options that the majority of users do not change or change very rarely and therefore saved the effort of creating an elaborate settings interface.
+
+Create a `dev.json` in your filemanager.
+
+## JSON Properties
+
+The JSON object has the following properties:
+
+| Key | Type | Description | Default |
+| --- | ---- | ----------- | ------- |
+| `bootsound` | string | Uses a custom melodie from the MELODIES folder | standart |
+| `uppercase` | boolean | Print every character in uppercase | true |
diff --git a/docs/onscreen.md b/docs/onscreen.md
index caa5f0f..57549bd 100644
--- a/docs/onscreen.md
+++ b/docs/onscreen.md
@@ -18,5 +18,6 @@ Hold down the middle button for 2s to exit the current menu and to save your set
 | `WEEKDAY` | Allows selection of start of week. |
 | `TEMP` | Allows selection of temperature system (°C or °F).  |
 | `APPS` | Allows to enable or disable internal apps  |
+| `SOUND` | Allows to enable or disable sound output   |
 | `UPDATE` | Check and download new firmware if available. |
 
diff --git a/src/Globals.cpp b/src/Globals.cpp
index 46fc48d..985bb2b 100644
--- a/src/Globals.cpp
+++ b/src/Globals.cpp
@@ -51,6 +51,11 @@ void loadDevSettings()
         BOOT_SOUND = doc["bootsound"].as<String>();
     }
 
+    if (doc.containsKey("bootsound"))
+    {
+        UPPERCASE_LETTERS = doc["uppercase"].as<bool>();
+    }
+
     file.close();
 }
 
diff --git a/src/ServerManager.cpp b/src/ServerManager.cpp
index bd322d4..f34edab 100644
--- a/src/ServerManager.cpp
+++ b/src/ServerManager.cpp
@@ -37,83 +37,6 @@ void saveHandler()
     webRequest->send(200);
 }
 
-void handleAPIRequest()
-{
-    WebServerClass *webRequest = mws.getRequest();
-    String url = webRequest->uri();
-    url.replace("/api", "");
-    if (webRequest->method() == HTTP_POST)
-    {
-        String body = webRequest->arg("plain");
-        const char *bodyPtr = body.c_str();
-        webRequest->send(200);
-        if (url == "/notify")
-        {
-            if (body[0] != '{' || body[strlen(bodyPtr) - 1] != '}')
-            {
-                webRequest->send(400, "text/plain", "Invalid payload format");
-                return;
-            }
-            DisplayManager.generateNotification(bodyPtr);
-        }
-
-        else if (url == "/timer")
-        {
-            DisplayManager.gererateTimer(bodyPtr);
-        }
-
-        else if (url == "/notify/dismiss")
-        {
-            DisplayManager.dismissNotify();
-        }
-
-        else if (url == "/apps")
-        {
-            DisplayManager.updateAppVector(bodyPtr);
-        }
-
-        else if (url == "/switch")
-        {
-            DisplayManager.switchToApp(bodyPtr);
-        }
-
-        else if (url == "/settings")
-        {
-            DisplayManager.setNewSettings(bodyPtr);
-        }
-
-        else if (url == "/nextapp")
-        {
-            DisplayManager.nextApp();
-        }
-
-        else if (url == "/previousapp")
-        {
-            DisplayManager.previousApp();
-        }
-
-        else if (url.startsWith("/custom"))
-        {
-            String topic_str = url.substring(MQTT_PREFIX.length() + 7);
-            DisplayManager.generateCustomPage(topic_str, bodyPtr);
-        }
-        else
-        {
-            webRequest->send(400);
-        }
-    }
-    else if (webRequest->method() == HTTP_GET)
-    {
-        if (url == "/stats")
-        {
-            webRequest->sendContent(DisplayManager.getStat());
-        }
-        else
-        {
-            webRequest->send(400);
-        }
-    }
-}
 
 void ServerManager_::setup()
 {
@@ -153,8 +76,6 @@ void ServerManager_::setup()
         mws.addHTML(custom_html, "icon_html");
         mws.addCSS(custom_css);
         mws.addJavascript(custom_script);
-        mws.addOptionBox("General");
-        mws.addOption("Uppercase letters", UPPERCASE_LETTERS);
         mws.addHandler("/save", HTTP_POST, saveHandler);
         mws.addHandler("/api/notify", HTTP_POST, []()
                        {DisplayManager.generateNotification(mws.webserver->arg("plain").c_str()); mws.webserver->send(200,"OK"); });
@@ -266,7 +187,6 @@ void ServerManager_::loadSettings()
         NET_SN = doc["Subnet"].as<String>();
         NET_PDNS = doc["Primary DNS"].as<String>();
         NET_SDNS = doc["Secondary DNS"].as<String>();
-        UPPERCASE_LETTERS = doc["Uppercase letters"];
         file.close();
         DisplayManager.applyAllSettings();
         Serial.println(F("Configuration loaded"));