diff --git a/apps/stage-tamagotchi/src/main/index.ts b/apps/stage-tamagotchi/src/main/index.ts
index e2b6715a2..e09d7ddd8 100644
--- a/apps/stage-tamagotchi/src/main/index.ts
+++ b/apps/stage-tamagotchi/src/main/index.ts
@@ -19,7 +19,7 @@ import { emitAppBeforeQuit, emitAppReady, emitAppWindowAllClosed, onAppBeforeQui
 import { setElectronMainDirname } from './libs/electron/location'
 import { setupInlayWindow } from './windows/inlay'
 import { setupMainWindow } from './windows/main'
-import { setupSettingsWindow } from './windows/settings'
+import { setupSettingsWindowReusableFunc } from './windows/settings'
 import { toggleWindowShow } from './windows/shared/window'
 
 setElectronMainDirname(__dirname)
@@ -32,7 +32,10 @@ const log = useLogg('main').useGlobalConfig()
 app.dock?.setIcon(icon)
 electronApp.setAppUserModelId('ai.moeru.airi')
 
-function setupTray(params: { mainWindow: BrowserWindow }): void {
+function setupTray(params: {
+  mainWindow: BrowserWindow
+  settingsWindow: () => Promise<BrowserWindow>
+}): void {
   once(() => {
     const appTray = new Tray(nativeImage.createFromPath(macOSTrayIcon).resize({ width: 16 }))
     onAppBeforeQuit(() => appTray.destroy())
@@ -41,7 +44,7 @@ function setupTray(params: { mainWindow: BrowserWindow }): void {
       { label: 'Show', click: () => toggleWindowShow(params.mainWindow) },
       { label: 'Inlay', click: () => setupInlayWindow() },
       { type: 'separator' },
-      { label: 'Settings', click: () => setupSettingsWindow() },
+      { label: 'Settings', click: () => params.settingsWindow().then(window => toggleWindowShow(window)) },
       { type: 'separator' },
       { label: 'Quit', click: () => app.quit() },
     ])
@@ -92,9 +95,10 @@ app.whenReady().then(async () => {
   await setupProjectAIRIServerRuntime()
 
   injecta.setLogger(createLoggLogger())
-  injecta.provide('mainWindow', async () => await setupMainWindow())
-  injecta.provide<{ mainWindow: BrowserWindow }>('tray', { dependsOn: { mainWindow: 'mainWindow' }, build: async ({ dependsOn }) => setupTray({ mainWindow: dependsOn.mainWindow }) })
-  injecta.invoke({ dependsOn: { mainWindow: 'mainWindow', tray: 'tray' }, callback: noop })
+  injecta.provide('windows:settings', () => setupSettingsWindowReusableFunc())
+  injecta.provide<{ settingsWindow: () => Promise<BrowserWindow> }>('windows:main', { dependsOn: { settingsWindow: 'windows:settings' }, build: async ({ dependsOn }) => setupMainWindow(dependsOn) })
+  injecta.provide<{ mainWindow: BrowserWindow, settingsWindow: () => Promise<BrowserWindow> }>('tray', { dependsOn: { mainWindow: 'windows:main', settingsWindow: 'windows:settings' }, build: async ({ dependsOn }) => setupTray(dependsOn) })
+  injecta.invoke({ dependsOn: { mainWindow: 'windows:main', tray: 'tray' }, callback: noop })
   injecta.start()
 
   // Lifecycle
diff --git a/apps/stage-tamagotchi/src/main/libs/electron/window-manager/index.ts b/apps/stage-tamagotchi/src/main/libs/electron/window-manager/index.ts
new file mode 100644
index 000000000..e2e28d4e1
--- /dev/null
+++ b/apps/stage-tamagotchi/src/main/libs/electron/window-manager/index.ts
@@ -0,0 +1 @@
+export * from './reusable'
diff --git a/apps/stage-tamagotchi/src/main/libs/electron/window-manager/reusable.ts b/apps/stage-tamagotchi/src/main/libs/electron/window-manager/reusable.ts
new file mode 100644
index 000000000..ef45038d4
--- /dev/null
+++ b/apps/stage-tamagotchi/src/main/libs/electron/window-manager/reusable.ts
@@ -0,0 +1,20 @@
+import type { BrowserWindow } from 'electron'
+
+export function createReusableWindow(setupFn: () => BrowserWindow | Promise<BrowserWindow>): { getWindow: () => Promise<BrowserWindow> } {
+  let window: BrowserWindow | undefined
+
+  return {
+    getWindow: async () => {
+      if (!window) {
+        window = await setupFn()
+        return window
+      }
+      if (window.isDestroyed()) {
+        window = await setupFn()
+        return window
+      }
+
+      return window
+    },
+  }
+}
diff --git a/apps/stage-tamagotchi/src/main/windows/inlay/index.ts b/apps/stage-tamagotchi/src/main/windows/inlay/index.ts
index 0a9daaa2d..3b4626704 100644
--- a/apps/stage-tamagotchi/src/main/windows/inlay/index.ts
+++ b/apps/stage-tamagotchi/src/main/windows/inlay/index.ts
@@ -1,17 +1,14 @@
-import { dirname, join, resolve } from 'node:path'
-import { fileURLToPath } from 'node:url'
+import { join, resolve } from 'node:path'
 
 import { BrowserWindow, shell } from 'electron'
 import { isMacOS } from 'std-env'
 
 import icon from '../../../../resources/icon.png?asset'
 
-import { baseUrl, load, withHashRoute } from '../../libs/electron/location'
+import { baseUrl, getElectronMainDirname, load, withHashRoute } from '../../libs/electron/location'
 import { currentDisplayBounds, mapForBreakpoints, resolutionBreakpoints, widthFrom } from '../shared/display'
 import { spotlightLikeWindowConfig } from '../shared/window'
 
-const __dirname = dirname(fileURLToPath(import.meta.url))
-
 export async function setupInlayWindow() {
   const window = new BrowserWindow({
     title: 'Inlay',
@@ -20,7 +17,7 @@ export async function setupInlayWindow() {
     show: false,
     icon,
     webPreferences: {
-      preload: join(dirname(fileURLToPath(import.meta.url)), '../preload/index.mjs'),
+      preload: join(__dirname, '../preload/index.mjs'),
       sandbox: false,
     },
     ...spotlightLikeWindowConfig(),
@@ -63,7 +60,7 @@ export async function setupInlayWindow() {
     return { action: 'deny' }
   })
 
-  await load(window, withHashRoute(baseUrl(resolve(__dirname, '..', '..', '..', 'renderer')), '/inlay'))
+  await load(window, withHashRoute(baseUrl(resolve(getElectronMainDirname(), '..', 'renderer')), '/inlay'))
 
   return window
 }
diff --git a/apps/stage-tamagotchi/src/main/windows/main/rpc/index.electron.ts b/apps/stage-tamagotchi/src/main/windows/main/rpc/index.electron.ts
index 50d9af777..afd8f99ef 100644
--- a/apps/stage-tamagotchi/src/main/windows/main/rpc/index.electron.ts
+++ b/apps/stage-tamagotchi/src/main/windows/main/rpc/index.electron.ts
@@ -1,13 +1,17 @@
 import type { BrowserWindow } from 'electron'
 
+import { defineInvokeHandler } from '@unbird/eventa'
 import { createContext } from '@unbird/eventa/adapters/electron/main'
 import { ipcMain } from 'electron'
 
+import { electronOpenMainDevtools, electronOpenSettings } from '../../../../shared/eventa'
 import { createFadeOnHoverService } from '../../../services/fade-on-hover'
+import { toggleWindowShow } from '../../shared'
 
-export function setupAppInvokeHandlers(window: BrowserWindow) {
-  const eventaContext = createContext(ipcMain, window)
-  const { context } = eventaContext
+export function setupMainWindowElectronInvokes(params: { window: BrowserWindow, settingsWindow: () => Promise<BrowserWindow> }) {
+  const { context } = createContext(ipcMain, params.window)
 
   createFadeOnHoverService(context)
+  defineInvokeHandler(context, electronOpenMainDevtools, () => params.window.webContents.openDevTools({ mode: 'detach' }))
+  defineInvokeHandler(context, electronOpenSettings, async () => toggleWindowShow(await params.settingsWindow()))
 }
diff --git a/apps/stage-tamagotchi/src/main/windows/manager/index.ts b/apps/stage-tamagotchi/src/main/windows/manager/index.ts
deleted file mode 100644
index e69de29bb..000000000
diff --git a/apps/stage-tamagotchi/src/main/windows/settings/index.ts b/apps/stage-tamagotchi/src/main/windows/settings/index.ts
index 5c9682214..65179338c 100644
--- a/apps/stage-tamagotchi/src/main/windows/settings/index.ts
+++ b/apps/stage-tamagotchi/src/main/windows/settings/index.ts
@@ -5,27 +5,32 @@ import { BrowserWindow, shell } from 'electron'
 import icon from '../../../../resources/icon.png?asset'
 
 import { baseUrl, getElectronMainDirname, load, withHashRoute } from '../../libs/electron/location'
+import { createReusableWindow } from '../../libs/electron/window-manager'
+import { setupSettingsWindowInvokes } from './rpc/index.electron'
 
 export function setupSettingsWindowReusableFunc() {
-  const window = new BrowserWindow({
-    title: 'Settings',
-    width: 600.0,
-    height: 800.0,
-    show: false,
-    icon,
-    webPreferences: {
-      preload: join(dirname(fileURLToPath(import.meta.url)), '../preload/index.mjs'),
-      sandbox: false,
-    },
-  })
+  return createReusableWindow(async () => {
+    const window = new BrowserWindow({
+      title: 'Settings',
+      width: 600.0,
+      height: 800.0,
+      show: false,
+      icon,
+      webPreferences: {
+        preload: join(__dirname, '../preload/index.mjs'),
+        sandbox: false,
+      },
+    })
 
-  window.on('ready-to-show', () => window.show())
-  window.webContents.setWindowOpenHandler((details) => {
-    shell.openExternal(details.url)
-    return { action: 'deny' }
-  })
+    window.on('ready-to-show', () => window.show())
+    window.webContents.setWindowOpenHandler((details) => {
+      shell.openExternal(details.url)
+      return { action: 'deny' }
+    })
 
-  await load(window, withHashRoute(baseUrl(resolve(getElectronMainDirname(), '..', 'renderer')), '/settings'))
+    await load(window, withHashRoute(baseUrl(resolve(getElectronMainDirname(), '..', 'renderer')), '/settings'))
+    await setupSettingsWindowInvokes({ settingsWindow: window })
 
-  return window
+    return window
+  }).getWindow
 }
diff --git a/apps/stage-tamagotchi/src/main/windows/settings/rpc/index.electron.ts b/apps/stage-tamagotchi/src/main/windows/settings/rpc/index.electron.ts
new file mode 100644
index 000000000..84192f5a0
--- /dev/null
+++ b/apps/stage-tamagotchi/src/main/windows/settings/rpc/index.electron.ts
@@ -0,0 +1,13 @@
+import type { BrowserWindow } from 'electron'
+
+import { defineInvokeHandler } from '@unbird/eventa'
+import { createContext } from '@unbird/eventa/adapters/electron/main'
+import { ipcMain } from 'electron'
+
+import { electronOpenSettingsDevtools } from '../../../../shared/eventa'
+
+export async function setupSettingsWindowInvokes(params: { settingsWindow: BrowserWindow }) {
+  const { context } = createContext(ipcMain, params.settingsWindow)
+
+  defineInvokeHandler(context, electronOpenSettingsDevtools, async () => params.settingsWindow.webContents.openDevTools({ mode: 'detach' }))
+}
diff --git a/apps/stage-tamagotchi/src/renderer/components/Widgets/ControlsIsland/index.vue b/apps/stage-tamagotchi/src/renderer/components/Widgets/ControlsIsland/index.vue
index d329fe334..1c5b0f533 100644
--- a/apps/stage-tamagotchi/src/renderer/components/Widgets/ControlsIsland/index.vue
+++ b/apps/stage-tamagotchi/src/renderer/components/Widgets/ControlsIsland/index.vue
@@ -1,21 +1,31 @@
 <script setup lang="ts">
 import { HearingConfigDialog } from '@proj-airi/stage-ui/components'
 import { useSettingsAudioDevice } from '@proj-airi/stage-ui/stores/settings'
+import { defineInvoke } from '@unbird/eventa'
+import { createContext } from '@unbird/eventa/adapters/electron/renderer'
 import { useDark, useToggle } from '@vueuse/core'
 import { storeToRefs } from 'pinia'
 
 import ControlButton from './ControlButton.vue'
 
+import { electronOpenSettings } from '../../../../shared/eventa'
+
 const isDark = useDark({ disableTransition: false })
 const toggleDark = useToggle(isDark)
 
 const settingsAudioDeviceStore = useSettingsAudioDevice()
 const { enabled } = storeToRefs(settingsAudioDeviceStore)
+
+const { context } = createContext(window.electron.ipcRenderer)
+const openSettings = defineInvoke(context, electronOpenSettings)
 </script>
 
 <template>
   <div fixed bottom-2 right-2>
     <div flex flex-col gap-1>
+      <ControlButton @click="() => openSettings()">
+        <div i-solar:settings-minimalistic-outline size-5 text="neutral-800 dark:neutral-300" />
+      </ControlButton>
       <HearingConfigDialog>
         <ControlButton>
           <Transition name="fade" mode="out-in">
diff --git a/apps/stage-tamagotchi/src/renderer/pages/settings/system/developer.vue b/apps/stage-tamagotchi/src/renderer/pages/settings/system/developer.vue
index 801b3e971..b5a70fdee 100644
--- a/apps/stage-tamagotchi/src/renderer/pages/settings/system/developer.vue
+++ b/apps/stage-tamagotchi/src/renderer/pages/settings/system/developer.vue
@@ -1,9 +1,13 @@
 <script setup lang="ts">
-import { CheckBar, IconItem } from '@proj-airi/stage-ui/components'
+import { ButtonBar, CheckBar, IconItem } from '@proj-airi/stage-ui/components'
 import { useSettings } from '@proj-airi/stage-ui/stores/settings'
+import { defineInvoke } from '@unbird/eventa'
+import { createContext } from '@unbird/eventa/adapters/electron/renderer'
 import { computed } from 'vue'
 import { useI18n } from 'vue-i18n'
 
+import { electronOpenMainDevtools } from '../../../../shared/eventa'
+
 const { t } = useI18n()
 const settings = useSettings()
 
@@ -15,9 +19,27 @@ const menu = computed(() => [
     to: '/devtools/use-magic-keys',
   },
 ])
+
+const { context } = createContext(window.electron.ipcRenderer)
+const openDevTools = defineInvoke(context, electronOpenMainDevtools)
 </script>
 
 <template>
+  <ButtonBar
+    v-model="settings.disableTransitions"
+    v-motion
+    mb-2
+    icon="i-solar:settings-minimalistic-outline"
+    text="settings.pages.page.developers.open-devtools.title"
+    :initial="{ opacity: 0, y: 10 }"
+    :enter="{ opacity: 1, y: 0 }"
+    :duration="250 + (19 * 10)"
+    :delay="1 * 50"
+    transition="all ease-in-out duration-250"
+    @click="() => openDevTools()"
+  >
+    {{ t('settings.pages.page.developers.open-devtools.button') }}
+  </ButtonBar>
   <CheckBar
     v-model="settings.disableTransitions"
     v-motion
@@ -28,7 +50,7 @@ const menu = computed(() => [
     :initial="{ opacity: 0, y: 10 }"
     :enter="{ opacity: 1, y: 0 }"
     :duration="250 + (19 * 10)"
-    :delay="1 * 50"
+    :delay="2 * 50"
     transition="all ease-in-out duration-250"
   />
   <CheckBar
@@ -42,7 +64,7 @@ const menu = computed(() => [
     :initial="{ opacity: 0, y: 10 }"
     :enter="{ opacity: 1, y: 0 }"
     :duration="250 + (20 * 10)"
-    :delay="2 * 50"
+    :delay="3 * 50"
     transition="all ease-in-out duration-250"
   />
 
@@ -55,7 +77,7 @@ const menu = computed(() => [
       :enter="{ opacity: 1, y: 0 }"
       :duration="250"
       :style="{
-        transitionDelay: `${index * 50}ms`, // delay between each item, unocss doesn't support dynamic generation of classes now
+        transitionDelay: `${(4 + index) * 50}ms`, // delay between each item, unocss doesn't support dynamic generation of classes now
       }"
       :title="item.title"
       :description="item.description"
diff --git a/apps/stage-tamagotchi/src/shared/eventa.ts b/apps/stage-tamagotchi/src/shared/eventa.ts
index 60e351180..2ffa1d480 100644
--- a/apps/stage-tamagotchi/src/shared/eventa.ts
+++ b/apps/stage-tamagotchi/src/shared/eventa.ts
@@ -15,4 +15,6 @@ interface Point {
 
 export const electronCursorPoint = defineEventa<Point>('electron:eventa:event:cursor-point')
 export const electronStartTrackingCursorPoint = defineInvokeEventa('electron:eventa:invoke:start-tracking-cursor-point')
-export const electronOpenSettings = defineInvokeEventa<void, void>('electron:eventa:invoke:open-settings')
+export const electronOpenMainDevtools = defineInvokeEventa<void, void>('electron:eventa:invoke:windows:main:devtools:open')
+export const electronOpenSettings = defineInvokeEventa<void, void>('electron:eventa:invoke:windows:settings:open')
+export const electronOpenSettingsDevtools = defineInvokeEventa<void, void>('electron:eventa:invoke:windows:settings:devtools:open')
diff --git a/packages/i18n/src/locales/en/settings.yaml b/packages/i18n/src/locales/en/settings.yaml
index 81aaadddf..1f4299541 100644
--- a/packages/i18n/src/locales/en/settings.yaml
+++ b/packages/i18n/src/locales/en/settings.yaml
@@ -1,6 +1,5 @@
 common:
   save: Save
-
 animations:
   stage-transitions:
     title: Disable Stage Transitions
@@ -186,19 +185,27 @@ pages:
           title: Parameters
           parameters:
             adaptive_threshold:
-              description: Whether to apply adaptive thresholds based on signal variance over time.
+              description: >-
+                Whether to apply adaptive thresholds based on signal variance
+                over time.
               label: Adaptive threshold
             buffer_duration:
               description: Duration of the internal analysis buffer.
               label: Buffer duration
             envelope_filter_frequency:
-              description: Frequency for the envelope filter applied to smooth energy changes.
+              description: >-
+                Frequency for the envelope filter applied to smooth energy
+                changes.
               label: Envelope filter frequency
             highpass_filter_frequency:
-              description: Frequency for the highpass filter applied to reduce low frequencies like sub-bass noises.
+              description: >-
+                Frequency for the highpass filter applied to reduce low
+                frequencies like sub-bass noises.
               label: Highpass filter frequency
             lowpass_filter_frequency:
-              description: Frequency for the lowpass filter applied to reduce high frequencies like vocals.
+              description: >-
+                Frequency for the lowpass filter applied to reduce high
+                frequencies like vocals.
               label: Lowpass filter frequency
             min_beat_interval:
               description: Maximum BPM or minimum interval between detected beats.
@@ -671,6 +678,11 @@ pages:
               title: Chinese Traditional Colors
           title: Color Scheme Presets
     title: System
+  page:
+    developers:
+      open-devtools:
+        title: Open Developer Tools
+        button: Open
 sections:
   section:
     general:
diff --git a/packages/i18n/src/locales/zh-Hans/settings.yaml b/packages/i18n/src/locales/zh-Hans/settings.yaml
index b7eef8e3d..05ed3b2f2 100644
--- a/packages/i18n/src/locales/zh-Hans/settings.yaml
+++ b/packages/i18n/src/locales/zh-Hans/settings.yaml
@@ -1,6 +1,5 @@
 common:
   save: 保存
-
 animations:
   stage-transitions:
     title: 是否开启舞台动画
@@ -601,6 +600,11 @@ pages:
               title: 中国传统颜色
           title: 预设
     title: 外观
+  page:
+    developers:
+      open-devtools:
+        button: 打开
+        title: 打开开发者工具
 sections:
   section:
     general:
diff --git a/packages/i18n/src/locales/zh-Hant/settings.yaml b/packages/i18n/src/locales/zh-Hant/settings.yaml
index 202eba00c..0ea9323c9 100644
--- a/packages/i18n/src/locales/zh-Hant/settings.yaml
+++ b/packages/i18n/src/locales/zh-Hant/settings.yaml
@@ -1,6 +1,5 @@
 common:
   save: 儲存
-
 animations:
   stage-transitions:
     title: 是否開啟舞台動畫
@@ -507,6 +506,10 @@ pages:
           title: 配色
         developer:
           title: 開發者
+          sections:
+            section:
+              use-magic-keys:
+                description: 測試快捷鍵
         theme-presets:
           presets:
             - colors:
diff --git a/packages/stage-ui/src/components/scenarios/settings/Bar.vue b/packages/stage-ui/src/components/scenarios/settings/Bar.vue
new file mode 100644
index 000000000..7a8f3d1fe
--- /dev/null
+++ b/packages/stage-ui/src/components/scenarios/settings/Bar.vue
@@ -0,0 +1,22 @@
+<script setup lang="ts">
+defineProps<{
+  text: string
+  description?: string
+}>()
+</script>
+
+<template>
+  <label
+    class="w-full flex cursor-pointer items-center justify-between rounded-lg px-4 py-3 text-sm outline-none transition-all duration-250 ease-in-out"
+    bg="neutral-50 dark:neutral-800"
+    hover="bg-neutral-200 dark:bg-neutral-700"
+  >
+    <div>
+      {{ $t(text) }}
+      <div v-if="description" text="sm neutral-500">
+        {{ $t(description) }}
+      </div>
+    </div>
+    <slot />
+  </label>
+</template>
diff --git a/packages/stage-ui/src/components/scenarios/settings/ButtonBar.vue b/packages/stage-ui/src/components/scenarios/settings/ButtonBar.vue
new file mode 100644
index 000000000..2781715f2
--- /dev/null
+++ b/packages/stage-ui/src/components/scenarios/settings/ButtonBar.vue
@@ -0,0 +1,23 @@
+<script setup lang="ts">
+import Bar from './Bar.vue'
+
+import { Button } from '../../misc'
+
+defineProps<{
+  text: string
+  icon: string
+  description?: string
+}>()
+
+const emits = defineEmits<{
+  (e: 'click'): void
+}>()
+</script>
+
+<template>
+  <Bar :text="text" :description="description">
+    <Button @click="emits('click')">
+      <slot />
+    </Button>
+  </Bar>
+</template>
diff --git a/packages/stage-ui/src/components/scenarios/settings/CheckBar.vue b/packages/stage-ui/src/components/scenarios/settings/CheckBar.vue
index 27b6ddc92..dc12665cb 100644
--- a/packages/stage-ui/src/components/scenarios/settings/CheckBar.vue
+++ b/packages/stage-ui/src/components/scenarios/settings/CheckBar.vue
@@ -1,4 +1,6 @@
 <script setup lang="ts">
+import Bar from './Bar.vue'
+
 defineProps<{
   text: string
   iconOn: string
@@ -9,21 +11,11 @@ const model = defineModel<boolean>()
 </script>
 
 <template>
-  <label
-    class="w-full flex cursor-pointer items-center justify-between rounded-lg px-4 py-3 text-sm outline-none transition-all duration-250 ease-in-out"
-    bg="neutral-50 dark:neutral-800"
-    hover="bg-neutral-200 dark:bg-neutral-700"
-  >
+  <Bar :text="text" :description="description">
     <input v-model="model" :aria-checked="model" type="checkbox" hidden>
-    <div>
-      {{ $t(text) }}
-      <div v-if="description" text="sm neutral-500">
-        {{ $t(description) }}
-      </div>
-    </div>
     <Transition name="slide-away" mode="out-in">
       <div v-if="model" :class="iconOn" transition="all ease-in-out duration-250" />
       <div v-else :class="iconOff" transition="all ease-in-out duration-250" />
     </Transition>
-  </label>
+  </Bar>
 </template>
diff --git a/packages/stage-ui/src/components/scenarios/settings/index.ts b/packages/stage-ui/src/components/scenarios/settings/index.ts
index a923de6b7..612106ce2 100644
--- a/packages/stage-ui/src/components/scenarios/settings/index.ts
+++ b/packages/stage-ui/src/components/scenarios/settings/index.ts
@@ -1 +1,3 @@
+export { default as Bar } from './Bar.vue'
+export { default as ButtonBar } from './ButtonBar.vue'
 export { default as CheckBar } from './CheckBar.vue'