diff --git a/assets/translation.json b/assets/translation.json
index e24350b..8d4f849 100644
--- a/assets/translation.json
+++ b/assets/translation.json
@@ -106,7 +106,8 @@
     "Continuous (Right to Left)": "连续（从右到左）",
     "Continuous (Top to Bottom)": "连续（从上到下）",
     "Auto page turning interval": "自动翻页间隔",
-    "The number of pic in screen (Only Gallery Mode)": "同屏幕图片数量(仅画廊模式)",
+    "The number of pic in screen for landscape (Only Gallery Mode)": "横屏同屏幕图片数量(仅画廊模式)",
+    "The number of pic in screen for portrait (Only Gallery Mode)": "竖屏同屏幕图片数量(仅画廊模式)",
     "Theme Mode": "主题模式",
     "System": "系统",
     "Light": "浅色",
@@ -468,7 +469,8 @@
     "Continuous (Right to Left)": "連續（從右到左）",
     "Continuous (Top to Bottom)": "連續（從上到下）",
     "Auto page turning interval": "自動翻頁間隔",
-    "The number of pic in screen (Only Gallery Mode)": "同螢幕圖片數量(僅畫廊模式)",
+    "The number of pic in screen for landscape (Only Gallery Mode)": "橫向同螢幕圖片數量(僅畫廊模式)",
+    "The number of pic in screen for portrait (Only Gallery Mode)": "直向同螢幕圖片數量(僅畫廊模式)",
     "Theme Mode": "主題模式",
     "System": "系統",
     "Light": "浅色",
diff --git a/lib/foundation/appdata.dart b/lib/foundation/appdata.dart
index 4b93e29..567cdda 100644
--- a/lib/foundation/appdata.dart
+++ b/lib/foundation/appdata.dart
@@ -133,7 +133,8 @@ class Settings with ChangeNotifier {
     'defaultSearchTarget': null,
     'autoPageTurningInterval': 5, // in seconds
     'readerMode': 'galleryLeftToRight', // values of [ReaderMode]
-    'readerScreenPicNumber': 1, // 1 - 5
+    'readerScreenPicNumberForLandscape': 1, // 1 - 5
+    'readerScreenPicNumberForPortrait': 1, // 1 - 5
     'enableTapToTurnPages': true,
     'reverseTapToTurnPages': false,
     'enablePageAnimation': true,
diff --git a/lib/pages/reader/reader.dart b/lib/pages/reader/reader.dart
index 8e1412f..9cf2bc5 100644
--- a/lib/pages/reader/reader.dart
+++ b/lib/pages/reader/reader.dart
@@ -113,9 +113,18 @@ class _ReaderState extends State<Reader> with _ReaderLocation, _ReaderWindow {
 
   late ReaderMode mode;
 
-  int get imagesPerPage => appdata.settings['readerScreenPicNumber'] ?? 1;
+  int get imagesPerPage {
+    if (isPortrait) {
+      return appdata.settings['readerScreenPicNumberForPortrait'] ?? 1;
+    } else {
+      return appdata.settings['readerScreenPicNumberForLandscape'] ?? 1;
+    }
+  }
 
-  int _lastImagesPerPage = appdata.settings['readerScreenPicNumber'] ?? 1;
+  late int _lastImagesPerPage;
+
+  bool get isPortrait =>
+      MediaQuery.of(context).orientation == Orientation.portrait;
 
   @override
   void didChangeDependencies() {
@@ -168,6 +177,9 @@ class _ReaderState extends State<Reader> with _ReaderLocation, _ReaderWindow {
     }
     mode = ReaderMode.fromKey(appdata.settings['readerMode']);
     history = widget.history;
+    _lastImagesPerPage = isPortrait
+        ? appdata.settings['readerScreenPicNumberForPortrait'] ?? 1
+        : appdata.settings['readerScreenPicNumberForLandscape'] ?? 1;
     Future.microtask(() {
       updateHistory();
     });
diff --git a/lib/pages/settings/reader.dart b/lib/pages/settings/reader.dart
index 7efb632..97e19fd 100644
--- a/lib/pages/settings/reader.dart
+++ b/lib/pages/settings/reader.dart
@@ -50,8 +50,10 @@ class _ReaderSettingsState extends State<ReaderSettings> {
           onChanged: () {
             var readerMode = appdata.settings['readerMode'];
             if (readerMode?.toLowerCase().startsWith('continuous') ?? false) {
-              appdata.settings['readerScreenPicNumber'] = 1;
-              widget.onChanged?.call('readerScreenPicNumber');
+              appdata.settings['readerScreenPicNumberForLandscape'] = 1;
+              widget.onChanged?.call('readerScreenPicNumberForLandscape');
+              appdata.settings['readerScreenPicNumberForPortrait'] = 1;
+              widget.onChanged?.call('readerScreenPicNumberForPortrait');
             }
             widget.onChanged?.call("readerMode");
           },
@@ -81,13 +83,40 @@ class _ReaderSettingsState extends State<ReaderSettings> {
                   : 1.0,
               duration: Duration(milliseconds: 300),
               child: _SliderSetting(
-                title: "The number of pic in screen (Only Gallery Mode)".tl,
-                settingsIndex: "readerScreenPicNumber",
+                title: "The number of pic in screen for landscape (Only Gallery Mode)".tl,
+                settingsIndex: "readerScreenPicNumberForLandscape",
                 interval: 1,
                 min: 1,
                 max: 5,
                 onChanged: () {
-                  widget.onChanged?.call("readerScreenPicNumber");
+                  widget.onChanged?.call("readerScreenPicNumberForLandscape");
+                },
+              ),
+            ),
+          ),
+        ),
+        SliverToBoxAdapter(
+          child: AbsorbPointer(
+            absorbing: (appdata.settings['readerMode']
+                ?.toLowerCase()
+                .startsWith('continuous') ??
+                false),
+            child: AnimatedOpacity(
+              opacity: (appdata.settings['readerMode']
+                  ?.toLowerCase()
+                  .startsWith('continuous') ??
+                  false)
+                  ? 0.5
+                  : 1.0,
+              duration: Duration(milliseconds: 300),
+              child: _SliderSetting(
+                title: "The number of pic in screen for portrait (Only Gallery Mode)".tl,
+                settingsIndex: "readerScreenPicNumberForPortrait",
+                interval: 1,
+                min: 1,
+                max: 5,
+                onChanged: () {
+                  widget.onChanged?.call("readerScreenPicNumberForPortrait");
                 },
               ),
             ),