diff --git a/app/ui/main_window.py b/app/ui/main_window.py
index 7168954..19639fb 100644
--- a/app/ui/main_window.py
+++ b/app/ui/main_window.py
@@ -6,7 +6,7 @@ import logging
 
 from PySide6.QtCore import Qt, QTimer
 from PySide6.QtMultimediaWidgets import QVideoWidget
-from PySide6.QtWidgets import QLabel, QMainWindow, QSizePolicy, QStatusBar, QVBoxLayout, QWidget
+from PySide6.QtWidgets import QLabel, QMainWindow, QSizePolicy, QStatusBar, QVBoxLayout, QWidget, QTextEdit
 
 from app.camera.camera_enumerator import CameraEnumerator, CameraInfo
 from app.camera.camera_service import CameraService
@@ -70,6 +70,11 @@ class MainWindow(QMainWindow):
         self._overlay = OverlayWidget(parent=self._container)
         self._overlay.raise_()
 
+        # --- Overlay for testing ---
+        self._test_overlay = QTextEdit(parent=self._container)
+        self._test_overlay.setReadOnly(True)
+        self._test_overlay.setStyleSheet("background-color: rgba(20, 20, 20, 0.5); color: white; font-size: 14px; border: none; padding: 8px;")
+
         # --- Menu bar ---
         self._menu = AppMenuBar(self)
         self.setMenuBar(self._menu)
@@ -187,6 +192,10 @@ class MainWindow(QMainWindow):
         self._overlay.setGeometry(self._video_widget.geometry())
         self._overlay.raise_()
 
+        # --- overlar for testing ---
+        panel_width = min(300, max(280, self._container.width() // 3))
+        self._test_overlay.setGeometry(18, 18, panel_width, 500)
+
     def closeEvent(self, event) -> None:  # noqa: N802
         self._camera_service.stop()
         super().closeEvent(event)