diff --git a/lib/pages/reader/images.dart b/lib/pages/reader/images.dart
index b034884..b1530f4 100644
--- a/lib/pages/reader/images.dart
+++ b/lib/pages/reader/images.dart
@@ -140,12 +140,12 @@ class _GalleryModeState extends State<_GalleryMode>
   int get totalPages {
     if (!reader.showSingleImageOnFirstPage()) {
       return (reader.images!.length /
-              reader.imagesPerPage())
+              reader.imagesPerPage)
           .ceil();
     } else {
       return 1 +
           ((reader.images!.length - 1) /
-                  reader.imagesPerPage())
+                  reader.imagesPerPage)
               .ceil();
     }
   }
@@ -169,7 +169,7 @@ class _GalleryModeState extends State<_GalleryMode>
 
   /// Get the range of images for the given page. [page] is 1-based.
   (int start, int end) getPageImagesRange(int page) {
-    var imagesPerPage = reader.imagesPerPage();
+    var imagesPerPage = reader.imagesPerPage;
     if (reader.showSingleImageOnFirstPage()) {
       if (page == 1) {
         return (0, 1);
@@ -191,6 +191,16 @@ class _GalleryModeState extends State<_GalleryMode>
     }
   }
 
+  /// Get the image indices for current page. Returns null if no images.
+  /// Returns a single index if only one image, or a range if multiple images.
+  (int, int)? getCurrentPageImageRange() {
+    if (reader.images == null || reader.images!.isEmpty) {
+      return null;
+    }
+    var (startIndex, endIndex) = getPageImagesRange(reader.page);
+    return (startIndex, endIndex);
+  }
+
   /// [cache] is used to cache the images.
   /// The count of images to cache is determined by the [preCacheCount] setting.
   /// For previous page and next page, it will do a memory cache.
@@ -259,7 +269,7 @@ class _GalleryModeState extends State<_GalleryMode>
 
             photoViewControllers[index] ??= PhotoViewController();
 
-            if (reader.imagesPerPage() == 1 ||
+            if (reader.imagesPerPage == 1 ||
                 pageImages.length == 1) {
               return PhotoViewGalleryPageOptions(
                 filterQuality: FilterQuality.medium,
@@ -533,17 +543,27 @@ class _GalleryModeState extends State<_GalleryMode>
 
   @override
   String? getImageKeyByOffset(Offset offset) {
-    String? imageKey;
-    if (reader.imagesPerPage() == 1) {
-      imageKey = reader.images![reader.page - 1];
-    } else {
-      for (var imageState in imageStates) {
-        if ((imageState as _ComicImageState).containsPoint(offset)) {
-          imageKey = (imageState.widget.image as ReaderImageProvider).imageKey;
+    var range = getCurrentPageImageRange();
+    if (range == null) return null;
+    
+    var (startIndex, endIndex) = range;
+    int actualImageCount = endIndex - startIndex;
+    
+    if (actualImageCount == 1) {
+      return reader.images![startIndex];
+    }
+    
+    for (var imageState in imageStates) {
+      if ((imageState as _ComicImageState).containsPoint(offset)) {
+        var imageKey = (imageState.widget.image as ReaderImageProvider).imageKey;
+        int index = reader.images!.indexOf(imageKey);
+        if (index >= startIndex && index < endIndex) {
+          return imageKey;
         }
       }
     }
-    return imageKey;
+    
+    return reader.images![startIndex];
   }
 }
 
diff --git a/lib/pages/reader/reader.dart b/lib/pages/reader/reader.dart
index ce5de8c..0f17b64 100644
--- a/lib/pages/reader/reader.dart
+++ b/lib/pages/reader/reader.dart
@@ -116,9 +116,9 @@ class _ReaderState extends State<Reader>
       return 1;
     }
     if (!showSingleImageOnFirstPage()) {
-      return (images!.length / imagesPerPage()).ceil();
+      return (images!.length / imagesPerPage).ceil();
     } else {
-      return 1 + ((images!.length - 1) / imagesPerPage()).ceil();
+      return 1 + ((images!.length - 1) / imagesPerPage).ceil();
     }
   }
 
@@ -277,13 +277,13 @@ class _ReaderState extends State<Reader>
         history!.page = images?.length ?? 1;
       } else {
         /// Record the first image of the page
-        if (!showSingleImageOnFirstPage() || imagesPerPage() == 1) {
-          history!.page = (page - 1) * imagesPerPage() + 1;
+        if (!showSingleImageOnFirstPage() || imagesPerPage == 1) {
+          history!.page = (page - 1) * imagesPerPage + 1;
         } else {
           if (page == 1) {
             history!.page = 1;
           } else {
-            history!.page = (page - 2) * imagesPerPage() + 2;
+            history!.page = (page - 2) * imagesPerPage + 2;
           }
         }
       }
@@ -371,13 +371,13 @@ abstract mixin class _ImagePerPageHandler {
   ComicType get type;
 
   void initImagesPerPage(int initialPage) {
-    _lastImagesPerPage = imagesPerPage();
+    _lastImagesPerPage = imagesPerPage;
     _lastOrientation = isPortrait;
-    if (imagesPerPage() != 1) {
+    if (imagesPerPage != 1) {
       if (showSingleImageOnFirstPage()) {
-        page = ((initialPage - 1) / imagesPerPage()).ceil() + 1;
+        page = ((initialPage - 1) / imagesPerPage).ceil() + 1;
       } else {
-        page = (initialPage / imagesPerPage()).ceil();
+        page = (initialPage / imagesPerPage).ceil();
       }
     }
   }
@@ -386,7 +386,7 @@ abstract mixin class _ImagePerPageHandler {
       appdata.settings.getReaderSetting(cid, type.sourceKey, 'showSingleImageOnFirstPage');
 
   /// The number of images displayed on one screen
-  int imagesPerPage() {
+  int get imagesPerPage {
     if (mode.isContinuous) return 1;
     if (isPortrait) {
       return appdata.settings.getReaderSetting(cid, type.sourceKey, 'readerScreenPicNumberForPortrait') ?? 1;
@@ -397,7 +397,7 @@ abstract mixin class _ImagePerPageHandler {
 
   /// Check if the number of images per page has changed
   void _checkImagesPerPageChange() {
-    int currentImagesPerPage = imagesPerPage();
+    int currentImagesPerPage = imagesPerPage;
     bool currentOrientation = isPortrait;
 
     if (_lastImagesPerPage != currentImagesPerPage || _lastOrientation != currentOrientation) {
diff --git a/lib/pages/reader/scaffold.dart b/lib/pages/reader/scaffold.dart
index e1257aa..ee052da 100644
--- a/lib/pages/reader/scaffold.dart
+++ b/lib/pages/reader/scaffold.dart
@@ -599,22 +599,24 @@ class _ReaderScaffoldState extends State<_ReaderScaffold> {
   }
 
   void saveCurrentImage() async {
-    var data = await selectImageToData();
-    if (data == null) {
+    var result = await selectImageToData();
+    if (result == null) {
       return;
     }
+    var (imageIndex, data) = result;
     var fileType = detectFileType(data);
-    var filename = "${context.reader.page}${fileType.ext}";
+    var filename = "${context.reader.widget.name}_${imageIndex + 1}${fileType.ext}";
     saveFile(data: data, filename: filename);
   }
 
   void share() async {
-    var data = await selectImageToData();
-    if (data == null) {
+    var result = await selectImageToData();
+    if (result == null) {
       return;
     }
+    var (imageIndex, data) = result;
     var fileType = detectFileType(data);
-    var filename = "${context.reader.page}${fileType.ext}";
+    var filename = "${context.reader.widget.name}_${imageIndex + 1}${fileType.ext}";
     Share.shareFile(data: data, filename: filename, mime: fileType.mime);
   }
 
@@ -719,8 +721,29 @@ class _ReaderScaffoldState extends State<_ReaderScaffold> {
   Future<int?> selectImage() async {
     var reader = context.reader;
     var imageViewController = context.reader._imageViewController;
-    if (imageViewController is _GalleryModeState && reader.imagesPerPage == 1) {
-      return reader.page - 1;
+
+    bool needsSelection = false;
+    int? singleImageIndex;
+
+    if (imageViewController is _GalleryModeState) {
+      var range = imageViewController.getCurrentPageImageRange();
+      if (range != null) {
+        var (startIndex, endIndex) = range;
+        int actualImageCount = endIndex - startIndex;
+        if (actualImageCount == 1) {
+          needsSelection = false;
+          singleImageIndex = startIndex;
+        } else {
+          needsSelection = true;
+        }
+      }
+    } else if (imageViewController is _ContinuousModeState) {
+      needsSelection = false;
+      singleImageIndex = reader.page - 1;
+    }
+
+    if (!needsSelection && singleImageIndex != null) {
+      return singleImageIndex;
     } else {
       var location = await _showSelectImageOverlay();
       if (location == null) {
@@ -734,20 +757,23 @@ class _ReaderScaffoldState extends State<_ReaderScaffold> {
     }
   }
 
-  /// Same as [selectImage], but return the image data.
-  Future<Uint8List?> selectImageToData() async {
+  /// Same as [selectImage], but return the image data with its index.
+  /// Returns (imageIndex, imageData) or null if cancelled.
+  Future<(int, Uint8List)?> selectImageToData() async {
     var i = await selectImage();
     if (i == null) {
       return null;
     }
     var imageKey = context.reader.images![i];
+    Uint8List data;
     if (imageKey.startsWith("file://")) {
-      return await File(imageKey.substring(7)).readAsBytes();
+      data = await File(imageKey.substring(7)).readAsBytes();
     } else {
-      return (await CacheManager().findCache(
+      data = await (await CacheManager().findCache(
         "$imageKey@${context.reader.type.sourceKey}@${context.reader.cid}@${context.reader.eid}",
       ))!.readAsBytes();
     }
+    return (i, data);
   }
 
   Future<Offset?> _showSelectImageOverlay() {