diff --git a/main.js b/main.js
index 7ae02c3..0954e2e 100644
--- a/main.js
+++ b/main.js
@@ -200,6 +200,18 @@ function createBigPictureWindow() {
 
   bigPictureWindow.once('ready-to-show', () => {
     bigPictureWindow.show();
+    
+    // Apply saved display scale to big picture window
+    try {
+      const configPath = path.join(app.getPath('userData'), 'localStorage');
+      const dbPath = path.join(configPath, 'leveldb');
+      // Note: localStorage will be applied via CSS in bigpicture.js since it reads from localStorage directly
+      // The IPC handler will apply setZoomFactor when adjustments are made
+      console.log('[BigPicture] Window ready - display scale will be applied from localStorage');
+    } catch (err) {
+      console.warn('[BigPicture] Failed to apply saved display scale on ready:', err);
+    }
+    
     console.log('[BigPicture] Window ready');
   });
 
@@ -789,7 +801,17 @@ ipcMain.on('theme-changed', (event, theme) => {
 // Handle display scale changes
 ipcMain.on('set-display-scale', (event, scale) => {
   console.log('[MAIN] set-display-scale →', scale);
-  // Could be used to persist scale setting or apply to all webviews
+  try {
+    // Get the webcontents from the event (will be bigPictureWindow)
+    const wc = event.sender;
+    if (wc && typeof wc.setZoomFactor === 'function') {
+      const zoomFactor = Math.max(0.5, Math.min(3, scale / 100));
+      wc.setZoomFactor(zoomFactor);
+      console.log(`[MAIN] Applied zoom factor: ${zoomFactor} for scale ${scale}%`);
+    }
+  } catch (err) {
+    console.warn('[MAIN] Failed to apply display scale:', err);
+  }
 });
 
 // Bookmark management
diff --git a/renderer/bigpicture.js b/renderer/bigpicture.js
index 71a3bdc..5b33442 100644
--- a/renderer/bigpicture.js
+++ b/renderer/bigpicture.js
@@ -179,8 +179,63 @@ const state = {
 // INITIALIZATION
 // =============================================================================
 
+function applyDisplayScale(scalePercent, reason = 'unknown') {
+  const numeric = Number(scalePercent);
+  if (!Number.isFinite(numeric)) return;
+
+  const clampedPercent = Math.min(300, Math.max(50, Math.round(numeric)));
+  const zoomFactor = Math.max(0.5, Math.min(3, clampedPercent / 100));
+
+  // Prefer Electron zoom (consistent across Chromium) with CSS fallback.
+  try {
+    if (ipcRenderer && typeof ipcRenderer.invoke === 'function') {
+      ipcRenderer.invoke('set-zoom-factor', zoomFactor).catch(err => {
+        console.warn('[BigPicture] set-zoom-factor failed; falling back to CSS zoom:', err);
+        applyCssZoom(zoomFactor);
+      });
+    } else {
+      applyCssZoom(zoomFactor);
+    }
+    applyCssZoom(zoomFactor);
+    console.log(`[BigPicture] Applied display scale ${clampedPercent}% (zoom=${zoomFactor}) via ${reason}`);
+  } catch (err) {
+    console.warn('[BigPicture] Failed applying display scale:', err);
+  }
+}
+
+function applyCssZoom(factor) {
+  try {
+    document.documentElement.style.zoom = factor;
+  } catch {}
+  try {
+    document.body.style.zoom = factor;
+  } catch {}
+  try {
+    document.documentElement.style.setProperty('--bp-scale-factor', factor);
+    document.body.style.setProperty('--bp-scale-factor', factor);
+  } catch {}
+}
+
+function applyDisplayScaleFromStorage(reason = 'startup') {
+  try {
+    const savedScale = localStorage.getItem(DISPLAY_SCALE_KEY);
+    if (!savedScale) return;
+    const parsed = parseInt(savedScale, 10);
+    if (Number.isFinite(parsed)) {
+      currentDisplayScale = Math.min(300, Math.max(50, parsed));
+      applyDisplayScale(currentDisplayScale, `${reason}-storage`);
+      updateScaleDisplay();
+    }
+  } catch (err) {
+    console.warn('[BigPicture] Failed to read display scale from storage:', err);
+  }
+}
+
 document.addEventListener('DOMContentLoaded', () => {
   console.log('[BigPicture] Initializing Big Picture Mode');
+
+  // Apply saved display scale as early as possible for this window.
+  applyDisplayScaleFromStorage('DOMContentLoaded');
   
   initClock();
   initNavigation();
@@ -1959,8 +2014,12 @@ function loadSavedSettings() {
   try {
     const savedScale = localStorage.getItem(DISPLAY_SCALE_KEY);
     if (savedScale) {
-      currentDisplayScale = parseInt(savedScale, 10);
-      updateScaleDisplay();
+      const parsed = parseInt(savedScale, 10);
+      if (Number.isFinite(parsed)) {
+        currentDisplayScale = Math.min(300, Math.max(50, parsed));
+        updateScaleDisplay();
+        applyDisplayScale(currentDisplayScale, 'loadSavedSettings');
+      }
     }
   } catch (err) {
     console.warn('[BigPicture] Failed to load display scale:', err);
@@ -2105,6 +2164,7 @@ function initDisplayScaleControls() {
   }
   
   updateScaleDisplay();
+  applyDisplayScale(currentDisplayScale, 'initDisplayScaleControls');
 }
 
 function adjustDisplayScale(delta) {
@@ -2128,9 +2188,12 @@ function updateScaleDisplay() {
 function saveDisplayScale() {
   try {
     localStorage.setItem(DISPLAY_SCALE_KEY, currentDisplayScale.toString());
-    
-    // Notify main process to update zoom level
-    if (ipcRenderer && ipcRenderer.send) {
+
+    // Apply zoom immediately to Big Picture UI.
+    applyDisplayScale(currentDisplayScale, 'saveDisplayScale');
+
+    // Notify main process (legacy channel) for compatibility.
+    if (ipcRenderer && typeof ipcRenderer.send === 'function') {
       ipcRenderer.send('set-display-scale', currentDisplayScale);
     }
   } catch (err) {