diff --git a/frontend/src/lib/stores.ts b/frontend/src/lib/stores.ts
index fa054c1..75e1a71 100644
--- a/frontend/src/lib/stores.ts
+++ b/frontend/src/lib/stores.ts
@@ -9,39 +9,3 @@ export const signedIn = writable(false);
 export const pathname = writable('/');
 
 export const alertModal = writable({ open: false, title: '', body: '' });
-
-import { goto } from '$app/navigation';
-import { page } from '$app/stores';
-
-const URLSearchParamsToObject = (params: URLSearchParams) => {
-	const obj = {};
-	params.forEach((v: string, k: string) => {
-		obj[k] = v;
-	});
-	return obj;
-};
-
-export const createQueryParamsStore = (key: string) => {
-	let params;
-	page.subscribe((v) => {
-		params = URLSearchParamsToObject(v.url.searchParams);
-	});
-
-	return {
-		// eslint-disable-next-line @typescript-eslint/ban-types
-		subscribe: (cb: Function) => {
-			return page.subscribe((p) => {
-				cb(p.url.searchParams.get(key));
-			});
-		},
-		set: (value: string) => {
-			params[key] = value;
-			const urlSearchParams = new URLSearchParams(params);
-			goto(`?${urlSearchParams.toString()}`, {
-				keepfocus: true,
-				replaceState: true,
-				noscroll: true
-			});
-		}
-	};
-};
diff --git a/frontend/src/routes/account/controllers/add/+page.svelte b/frontend/src/routes/account/controllers/add/+page.svelte
index 4af9bea..96ddd96 100644
--- a/frontend/src/routes/account/controllers/add/+page.svelte
+++ b/frontend/src/routes/account/controllers/add/+page.svelte
@@ -129,7 +129,7 @@ SPDX-License-Identifier: MPL-2.0
 				</span>
 
 				<a
-					href="/account/login"
+					href="/controller"
 					class="mx-2 text-sm font-bold text-blue-500 dark:text-blue-400 hover:underline"
 					>Read more here.</a
 				>
diff --git a/frontend/src/routes/docs/(markdown)/classquizcontroller/+page.svx b/frontend/src/routes/docs/(markdown)/classquizcontroller/+page.svx
new file mode 100644
index 0000000..5c2fc08
--- /dev/null
+++ b/frontend/src/routes/docs/(markdown)/classquizcontroller/+page.svx
@@ -0,0 +1,20 @@
+<!--
+SPDX-FileCopyrightText: 2023 Marlon W (Mawoka)
+
+SPDX-License-Identifier: MPL-2.0
+-->
+
+# ClassQuizController
+
+## Setup
+
+At first, you plug it into power, and after some seconds a WLAN-hotspot should be available, called
+**ClassQuizController** with no password, which you can connect to. You're getting asked to sign in, and on this page,
+you can enter your Wi-Fi SSID and your Wi-Fi password.
+
+After that, wait two minutes and [add the controller](/account/controllers/add). Give it a name and a player name. The
+player name is used in-game and the name is jus used for knowing which controller is which.
+
+You're getting presented with a code. The code consists of upper- and lowercase letters and colored bars under these. A
+long bar (or uppercase letter) stands for along press and a lowercase letter (short bar) stands, respectively, for a
+short press. If everything worked, the controller should be connected.