diff --git a/lib/components/style/sliding_up_opener.dart b/lib/components/style/sliding_up_opener.dart
index b2cd7e08..d00411a4 100644
--- a/lib/components/style/sliding_up_opener.dart
+++ b/lib/components/style/sliding_up_opener.dart
@@ -13,6 +13,8 @@ class SlidingUpOpener extends StatefulWidget {
   /// The height of the sliding panel when fully open.
   final double maxHeight;
 
+  final double heightOffset;
+
   /// If non-null, shows a darkening shadow over the [body] as
   /// the panel slides open.
   final bool backdropEnabled;
@@ -67,6 +69,7 @@ class SlidingUpOpener extends StatefulWidget {
     this.minHeight = 160.0,
     this.maxHeight = 500.0,
     this.borderRadius = 16.0,
+    this.heightOffset = 0.0,
     this.backdropEnabled = true,
     this.catchPopScope = true,
     this.clickToOpen = true,
@@ -109,7 +112,7 @@ class SlidingUpOpenerState extends State<SlidingUpOpener> {
       collapsed: buildCollapsed(),
       body: Column(children: [
         Expanded(child: widget.body),
-        SizedBox(height: widget.minHeight + 80),
+        SizedBox(height: widget.minHeight + widget.heightOffset + 80),
       ]),
     );
 
diff --git a/lib/ui/image_gallery_screen.dart b/lib/ui/image_gallery_screen.dart
index d3cd56c4..b91062ef 100644
--- a/lib/ui/image_gallery_screen.dart
+++ b/lib/ui/image_gallery_screen.dart
@@ -191,7 +191,7 @@ class ImageGalleryScreenState extends State<ImageGalleryScreen> {
           .replaceFirst('.', '');
       // 原本檔名是 uuid v4 產生，前綴為 [0-9A-F]，
       // 為了做區別而設計成這樣。
-      final dst = XFile.fs.path.join(baseDir.path, 'G$name');
+      final dst = XFile.fs.path.join(baseDir.path, 'g$name');
       Log.ger('save_image', 'start', dst);
 
       // avator first, avoid different with origin one
diff --git a/lib/ui/order/cashier/order_cashier_modal.dart b/lib/ui/order/cashier/order_cashier_modal.dart
index a5da8b5e..7d663b6d 100644
--- a/lib/ui/order/cashier/order_cashier_modal.dart
+++ b/lib/ui/order/cashier/order_cashier_modal.dart
@@ -60,6 +60,7 @@ class _OrderCashierModalState extends State<OrderCashierModal> {
       // 4 rows * 64 + 24 (insets) + 64 (collapse)
       maxHeight: 408,
       minHeight: 84,
+      heightOffset: 58,
       renderPanelSheet: false,
       body: body,
       panel: panel,
diff --git a/test/image_gallery_screen_test.dart b/test/image_gallery_screen_test.dart
index bd2875a1..a962bc5c 100644
--- a/test/image_gallery_screen_test.dart
+++ b/test/image_gallery_screen_test.dart
@@ -39,7 +39,8 @@ void main() {
       await tester.tap(find.byKey(const Key('image_gallery.add')));
       await tester.pumpAndSettle();
 
-      expect(imagePath, startsWith('menu_image/G20'));
+      final pattern = RegExp('menu_image/g[0-9]{8}T[0-9]{12}');
+      expect(pattern.hasMatch(imagePath!), isTrue);
       expect(XFile('$imagePath-avator').file.existsSync(), isTrue);
     });
 
@@ -87,10 +88,10 @@ void main() {
 
     testWidgets('delete selected', (tester) async {
       final gallery = GlobalKey<ImageGalleryScreenState>();
-      await createImageAt('G20230102030405111');
-      await createImageAt('G20230102030405222');
-      await createImageAt('G20230102030405222-avator');
-      await createImageAt('G20230102030405333');
+      await createImageAt('g20230102030405111');
+      await createImageAt('g20230102030405222');
+      await createImageAt('g20230102030405222-avator');
+      await createImageAt('g20230102030405333');
 
       await tester.pumpWidget(MaterialApp(
         home: ImageGalleryScreen(key: gallery),
@@ -144,8 +145,8 @@ void main() {
       expect(
         gallery.currentState!.images,
         equals([
-          'menu_image/G20230102030405333',
-          'menu_image/G20230102030405111',
+          'menu_image/g20230102030405333',
+          'menu_image/g20230102030405111',
         ]),
       );
 
@@ -159,7 +160,7 @@ void main() {
 
       expect(
         gallery.currentState!.images,
-        equals(['menu_image/G20230102030405333']),
+        equals(['menu_image/g20230102030405333']),
       );
     });