diff --git a/src/emevo/analysis/qt_widget.py b/src/emevo/analysis/qt_widget.py
index 02dfb37..e73d1d2 100644
--- a/src/emevo/analysis/qt_widget.py
+++ b/src/emevo/analysis/qt_widget.py
@@ -51,7 +51,7 @@ def _mgl_qsurface_fmt() -> QSurfaceFormat:
     return fmt
 
 
-N_MAX_SCAN: int = 20480
+N_MAX_SCAN: int = 10000
 N_MAX_CACHED_LOG: int = 100
 
 
@@ -87,6 +87,7 @@ def __init__(
         x_range, y_range = env._x_range, env._y_range
         self._scaling = x_range / figsize[0], y_range / figsize[1]
         self._phys_state = saved_physics
+        self._index = start
         self._make_renderer = partial(
             MglRenderer,
             screen_width=self._figsize[0],
@@ -94,13 +95,12 @@ def __init__(
             x_range=x_range,
             y_range=y_range,
             space=env._physics,
-            stated=self._get_stated(0),
+            stated=self._get_stated(),
             sensor_fn=env._get_sensors,
             sc_color_opt=env._food_color,
         )
         self._env = env
         self._get_colors = get_colors
-        self._index = start
         self._end_index = self._phys_state.circle_axy.shape[0] if end is None else end
         self._paused = False
         self._initialized = False
@@ -121,8 +121,8 @@ def _scale_position(self, position: QPointF) -> tuple[float, float]:
             (self._figsize[1] - position.y()) * self._scaling[1],
         )
 
-    def _get_stated(self, index: int) -> StateDict:
-        return self._phys_state.set_by_index(index, self._env_state.physics)
+    def _get_stated(self) -> StateDict:
+        return self._phys_state.set_by_index(self._index, self._env_state.physics)
 
     def _set_default_viewport(self) -> None:
         self._ctx.viewport = 0, 0, *self._figsize
@@ -149,7 +149,7 @@ def paintGL(self) -> None:
         if not self._paused and self._index < self._end_index - 1:
             self._index += 1
             self.stepChanged.emit(self._index)
-        stated = self._get_stated(self._index)
+        stated = self._get_stated()
         if self._get_colors is None:
             circle_colors = None
         else:
@@ -163,7 +163,7 @@ def exitable(self) -> bool:
 
     def mousePressEvent(self, evt: QMouseEvent) -> None:  # type: ignore
         position = self._scale_position(evt.position())
-        circle = self._get_stated(self._index).circle
+        circle = self._get_stated().circle
         overlap = _overlap(
             jnp.array(position),
             self._env._physics.shaped.circle,
@@ -347,6 +347,8 @@ def __init__(
         pause_button.clicked.connect(self._mgl_widget.pause)
         play_button = QtWidgets.QPushButton("▶️")
         play_button.clicked.connect(self._mgl_widget.play)
+        export_button = QtWidgets.QPushButton("📤")
+        export_button.clicked.connect(self._exportData)
         # Colorbar
         radiobutton_1 = QtWidgets.QRadioButton("Energy")
         radiobutton_2 = QtWidgets.QRadioButton("Num. Children")
@@ -571,6 +573,19 @@ def cbarFood2(self, checked: bool) -> None:
             self._cbar_state = CBarState.FOOD_REWARD2
             self._cbar_changed = True
 
+    @Slot()
+    def exportData(self) -> None:
+        stated = self._mgl_widget.get_stated()
+        # TODO: filename
+        np.savez_compressed(
+            "exported.npz",
+            circle_axy=np.array(stated.circle.p.into_axy()),
+            circle_is_active=np.array(stated.circle.is_active),
+            static_circle_axy=np.array(stated.static_circle.p.into_axy()),
+            static_circle_is_active=np.array(stated.static_circle.is_active),
+            static_circle_label=np.array(stated.static_circle.label),
+        )
+
 
 def start_widget(widget_cls: type[QtWidgets.QWidget], **kwargs) -> None:
     app = QtWidgets.QApplication([])