diff --git a/.changeset/polite-glasses-add.md b/.changeset/polite-glasses-add.md
new file mode 100644
index 000000000..8615b7323
--- /dev/null
+++ b/.changeset/polite-glasses-add.md
@@ -0,0 +1,5 @@
+---
+'@spotlightjs/overlay': patch
+---
+
+ref(overlay): Rename `fullscreen` option to `openOnInit`
diff --git a/packages/overlay/src/App.tsx b/packages/overlay/src/App.tsx
index 3c0cba387..f1d0de70e 100644
--- a/packages/overlay/src/App.tsx
+++ b/packages/overlay/src/App.tsx
@@ -1,23 +1,17 @@
 import { useEffect, useState } from 'react';
 import Debugger from './components/Debugger';
-import Trigger, { type Anchor } from './components/Trigger';
+import Trigger from './components/Trigger';
 import type { Integration, IntegrationData } from './integrations/integration';
 import { getSpotlightEventTarget } from './lib/eventTarget';
 import { log } from './lib/logger';
 import { connectToSidecar } from './sidecar';
-import { TriggerButtonCount } from './types';
+import { SpotlightOverlayOptions, TriggerButtonCount } from './types';
 
-type AppProps = {
-  fullScreen?: boolean;
-  showTriggerButton?: boolean;
-  defaultEventId?: string;
-  integrations?: Integration[];
-  sidecarUrl: string;
-  anchor?: Anchor;
-};
+type AppProps = Omit<SpotlightOverlayOptions, 'debug' | 'injectImmediately'> &
+  Required<Pick<SpotlightOverlayOptions, 'sidecarUrl'>>;
 
 export default function App({
-  fullScreen = false,
+  openOnInit = false,
   showTriggerButton = true,
   defaultEventId,
   integrations = [],
@@ -29,7 +23,7 @@ export default function App({
   const [integrationData, setIntegrationData] = useState<IntegrationData<unknown>>({});
   const [isOnline, setOnline] = useState(false);
   const [triggerButtonCount, setTriggerButtonCount] = useState<TriggerButtonCount>({ general: 0, severe: 0 });
-  const [isOpen, setOpen] = useState(fullScreen);
+  const [isOpen, setOpen] = useState(openOnInit);
 
   useEffect(() => {
     // Map that holds the information which kind of content type should be dispatched to which integration(s)
diff --git a/packages/overlay/src/index.tsx b/packages/overlay/src/index.tsx
index 61d476a50..afdf53f1f 100644
--- a/packages/overlay/src/index.tsx
+++ b/packages/overlay/src/index.tsx
@@ -63,7 +63,7 @@ export async function onSevereEvent(cb: (count: number) => void) {
 const DEFAULT_SIDECAR_URL = 'http://localhost:8969/stream';
 
 export async function init({
-  fullScreen = false,
+  openOnInit = false,
   showTriggerButton = true,
   defaultEventId,
   injectImmediately = false,
@@ -114,7 +114,7 @@ export async function init({
     // <React.StrictMode>
     <App
       integrations={initializedIntegrations}
-      fullScreen={fullScreen}
+      openOnInit={openOnInit}
       defaultEventId={defaultEventId}
       showTriggerButton={showTriggerButton}
       sidecarUrl={sidecarUrl}
diff --git a/packages/overlay/src/types.ts b/packages/overlay/src/types.ts
index fd600b731..ab91e55f0 100644
--- a/packages/overlay/src/types.ts
+++ b/packages/overlay/src/types.ts
@@ -14,16 +14,6 @@ export type SpotlightOverlayOptions = {
    */
   integrations?: Integration[];
 
-  /**
-   * TODO: Rename
-   *
-   * If set to `true`, the Spotlight overlay Window will be opened immediately
-   * after calling the init.
-   *
-   * @default false - only the Spotlight button is visible.
-   */
-  fullScreen?: boolean;
-
   /**
    * Set a URL to a custom Spotlight Sidecar instance. The Spotlight overlay
    * will use this URL instead of the default URL to connect to the sidecar
@@ -34,13 +24,12 @@ export type SpotlightOverlayOptions = {
   sidecarUrl?: string;
 
   /**
-   * If set to `false`, the Spotlight button will not be visible.
-   * This is useful if Spotlight is integrated into an existing UI,
-   * such as the Astro Dev Overlay.
+   * If set to `true`, the Spotlight overlay Window will be opened immediately
+   * after calling the init function.
    *
-   * @default true
+   * @default false - only the Spotlight button is visible.
    */
-  showTriggerButton?: boolean;
+  openOnInit?: boolean;
 
   /**
    * By default, Spotlight waits until the host page is loaded before injecting the
@@ -56,6 +45,15 @@ export type SpotlightOverlayOptions = {
    */
   injectImmediately?: boolean;
 
+  /**
+   * If set to `false`, the Spotlight button will not be visible.
+   * This is useful if Spotlight is integrated into an existing UI,
+   * such as the Astro Dev Overlay.
+   *
+   * @default true
+   */
+  showTriggerButton?: boolean;
+
   /**
    * Set this option to define where the spotlight button should be anchored.
    *
diff --git a/packages/website/src/content/docs/reference/configuration.md b/packages/website/src/content/docs/reference/configuration.md
index e481b80d9..c9a31fc4c 100644
--- a/packages/website/src/content/docs/reference/configuration.md
+++ b/packages/website/src/content/docs/reference/configuration.md
@@ -92,3 +92,10 @@ init({
   injectImmediately: true,
 });
 ```
+
+### `openOnInit`
+
+**type:** `boolean` **default:** `false`
+
+If set to `true`, the Spotlight overlay Window will be opened immediately after calling the init function. By default,
+only the button is visible.