diff --git a/lib/ui/settings_page.dart b/lib/ui/settings_page.dart
index 73c6751..83b8577 100644
--- a/lib/ui/settings_page.dart
+++ b/lib/ui/settings_page.dart
@@ -1157,9 +1157,8 @@ class _SettingsPageState extends State<SettingsPage> {
       };
 
   /// 맨 위 바로가기: 묶음 이름을 누르면 그 묶음으로 스크롤
-  Widget _groupBar(bool desk) => Padding(
-        padding: const EdgeInsets.only(bottom: 8),
-        child: Wrap(spacing: 8, runSpacing: 8, children: [
+  Widget _groupBar(bool desk) {
+    final chips = [
           for (final id in _groupIds)
             if ((id != 'run' || desk) &&
                 (id != 'ai' || c.settings.components.contains('aiimage')) &&
@@ -1175,8 +1174,24 @@ class _SettingsPageState extends State<SettingsPage> {
                   }
                 },
               ),
-        ]),
+    ];
+    // 255: 좁은 화면 (세로 폰) 은 한 줄로 옆으로 밀게 - 여러 줄로 감기면 위에 늘 고정된 4줄이 화면 절반을 차지해 내용이 반만 보였다
+    if (isCompact(context)) {
+      return Padding(
+        padding: const EdgeInsets.only(bottom: 4),
+        child: SingleChildScrollView(
+          scrollDirection: Axis.horizontal,
+          child: Row(children: [
+            for (final (i, w) in chips.indexed) ...[if (i > 0) const SizedBox(width: 8), w],
+          ]),
+        ),
       );
+    }
+    return Padding(
+      padding: const EdgeInsets.only(bottom: 8),
+      child: Wrap(spacing: 8, runSpacing: 8, children: chips),
+    );
+  }
 
   /// 묶음 하나: 제목 (아이콘) 과 항목들을 한 카드에
   Widget _group(String id, IconData icon, String title, List<Widget> children) => Card(
diff --git a/test/settings_group_bar_test.dart b/test/settings_group_bar_test.dart
new file mode 100644
index 0000000..36ccb4b
--- /dev/null
+++ b/test/settings_group_bar_test.dart
@@ -0,0 +1,37 @@
+import 'dart:io';
+
+import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:jj_mkvmaker/app/app_controller.dart';
+import 'package:jj_mkvmaker/platform/windows/desktop_storage_service.dart';
+import 'package:jj_mkvmaker/platform/windows/process_media_tool.dart';
+import 'package:jj_mkvmaker/services/platform_services.dart';
+import 'package:jj_mkvmaker/ui/settings_page.dart';
+
+/// 255: 세로 폰의 환경 설정 - 위의 묶음 바로가기가 한 줄 (여러 줄로 감겨 화면 절반을 차지하지 않게)
+void main() {
+  for (final (size, oneRow) in [(const Size(412, 900), true), (const Size(1400, 900), false)]) {
+    testWidgets('255: 묶음 바로가기 (${size.width.round()}×${size.height.round()}) - 좁으면 한 줄', (tester) async {
+      final tmp = Directory.systemTemp.createTempSync('jj_set255_');
+      addTearDown(() => tmp.deleteSync(recursive: true));
+      const pp = MethodChannel('plugins.flutter.io/path_provider');
+      tester.binding.defaultBinaryMessenger.setMockMethodCallHandler(pp, (_) async => tmp.path);
+      addTearDown(() => tester.binding.defaultBinaryMessenger.setMockMethodCallHandler(pp, null));
+      tester.view.physicalSize = size;
+      tester.view.devicePixelRatio = 1;
+      addTearDown(tester.view.reset);
+      final c = AppController(PlatformServices(mediaTool: ProcessMediaTool('x', 'y'), storage: DesktopStorageService()));
+      await tester.runAsync(() => tester.pumpWidget(MaterialApp(home: SettingsPage(c: c))));
+      await tester.pump();
+      final tops = {for (final e in find.byType(ActionChip).evaluate()) tester.getRect(find.byWidget(e.widget)).top.round()};
+      expect(tops, isNotEmpty);
+      if (oneRow) {
+        expect(tops, hasLength(1), reason: '좁으면 한 줄 (옆으로 밀기)');
+      }
+      expect(tester.takeException(), isNull);
+      await tester.pumpWidget(const SizedBox());
+      await tester.pump(const Duration(seconds: 1));
+    });
+  }
+}